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@aws-sdk/core

3.978.1aws/aws-sdk-js-v3 ↗New releases in your daily digest, changelog included.

Core functions & classes shared by multiple AWS SDK clients.

Last release 12 days ago
22 Sep 2026
Ships on a steady schedule
a new release about every 2 weeks
Nearly every release is documented
notes for 59 of the last 60 stable releases
9 versions withdrawn
withdrawn after publishing
3 years old
232 releases · first in 2023

Release timeline

232 releases since 2023

2023202420252026

20232026

One column per quarter.

Releases

3.978.122 Sept 2026
codegen: sync for MetricsRecorder support and core error/retry fixes
Chores

codegen: sync for MetricsRecorder support and core error/retry fixes (#8312) (9a10476)
Open source →
3.978.09 Sept 2026
client-cognito-identity-provider: This release adds support for a new lambda trigger to transform federated user attributes during the authentication
Features

client-cognito-identity-provider: This release adds support for a new lambda trigger to transform federated user attributes during the authentication with external identity providers on Cognito Managed Login. (a291dae)

client-connect: Adds support for filtering search results based on tags assigned to contacts. (c3e7a41)

client-ec2: SearchTransitGatewayRoutes API response now includes a NextToken field, enabling pagination when retrieving large sets of transit gateway routes. Pass the returned NextToken value in subsequent requests to retrieve the next page of results. (11fdee1)

client-lambda: We are launching ESM Metrics and logging for Kafka ESM to allow customers to monitor Kafka event processing using CloudWatch Metrics and Logs. (af7d3d5)

client-mediaconnect: This release adds support for NDI flow sources in AWS Elemental MediaConnect. You can now send content to your MediaConnect transport streams directly from your NDI environment using the new NDI source type. Also adds support for LARGE 4X flow size, which can be used when creating CDI JPEG-XS flows. (a5e075c)

client-mediaconvert: This release adds a follow source mode for audio output channel count, an AES audio frame wrapping option for MXF outputs, and an option to signal DolbyVision compatibility using the SUPPLEMENTAL-CODECS tag in HLS manifests. (9ee4545)

client-s3-control: Adds support for the UpdateObjectEncryption API to change the server-side encryption type of objects in general purpose buckets. (8248439)

client-s3: Adds support for the UpdateObjectEncryption API to change the server-side encryption type of objects in general purpose buckets. (b56cea5)

From the same repository

aws/aws-sdk-js-v3

Additional notes

Features

dynamic-client: create untyped clients from Smithy JSON AST (#8270) (4334050)

Open source →

3.977.921 Aug 2026

codegen: update to sync with the latest smithy-ts

Chores

codegen: update to sync with the latest smithy-ts (#8272) (8369ada)

Open source →

3.977.814 Aug 2026

### Chores * upgrade to typescript 7

Chores

upgrade to typescript 7 (#8264) (ca81fbb)

Open source →

3.977.711 Aug 2026

### Chores * upgrade to typescript 6

Chores

upgrade to typescript 6 (#8257) (edabd4a)

Open source →

3.977.64 Aug 2026

core/protocols: fix number precision check

Bug Fixes

core/protocols: fix number precision check (#8252) (3ab3c0e)

Open source →

3.977.53 Aug 2026withdrawn: Deprecated due to Document number parsing bug in JSON, see https://github.com/aws/aws-sdk-js-v3/issues/8246. Newer version available.

core/protocols: document and number serialization fixes

Bug Fixes

core/protocols: document and number serialization fixes (#8245) (71d4384)

Chores

core/protocols: switch to v2 JSON codecs (#8234) (54c1c23)

Open source →

3.977.431 Jul 2026withdrawn: Deprecated due to Document number parsing bug in JSON, see https://github.com/aws/aws-sdk-js-v3/issues/8246. Newer version available.

core/protocols: v2 JSON codec updates and JsonBytesStringAdapter

Bug Fixes

core/protocols: v2 JSON codec updates and JsonBytesStringAdapter (#8238) (a1001f4)

Open source →

3.977.329 Jul 2026withdrawn: Deprecated due to Document number parsing bug in JSON, see https://github.com/aws/aws-sdk-js-v3/issues/8246. Newer version available.

codegen: sync for CBOR v2 codec

Chores

codegen: sync for CBOR v2 codec (#8233) (e40ebac)
core/protocols: expose v2 JSON codecs (#8232) (e6fa556)

Open source →

3.977.228 Jul 2026withdrawn: Deprecated due to Document number parsing bug in JSON, see https://github.com/aws/aws-sdk-js-v3/issues/8246. Newer version available.

core/protocols: organize json codec folders

Chores

core/protocols: organize json codec folders (#8230) (8c117e3)

Open source →

3.977.124 Jul 2026withdrawn: Deprecated due to Document number parsing bug in JSON, see https://github.com/aws/aws-sdk-js-v3/issues/8246. Newer version available.

core/protocols: handle JSON exponent notation in jsonReviver

Bug Fixes

core/protocols: handle JSON exponent notation in jsonReviver (#8226) (c3b27fd)

Open source →

3.977.024 Jul 2026withdrawn: Deprecated due to Document number parsing bug in JSON, see https://github.com/aws/aws-sdk-js-v3/issues/8246. Newer version available.2 sources agree

core/protocols: use default structIterator

3.977.0(2026-01-27)

Chores

core/protocols: use default structIterator (#7684) (eb471df6)

New Features

clients: update client endpoints as of 2026-01-27 (04a9ab71)
client-ec2: Releasing new EC2 instances. C8gb and M8gb with highest EBS performance, M8gn with 600 Gbps network bandwidth, X8aedz and M8azn with 5GHz AMD processors, X8i with Intel Xeon 6 processors and up to 6TB memory, and Mac-m4max with Apple M4 Max chip for 25 percent faster builds. (8c83ff92)
client-connect: Added support for task attachments. The StartTaskContact API now accepts file attachments, enabling customers to include files (.csv, .doc, .docx, .heic, .jfif, .jpeg, .jpg, .mov, .mp4, .pdf, .png, .ppt, .pptx, .rtf, .txt, etc.) when creating Task contacts. Supports up to 5 attachments per task. (12e1a94a)
client-medialive: AWS Elemental MediaLive released two new features that allows customers 1) to set Output Timecode for AV1 encoder, 2) to set a Custom Epoch for CMAF Ingest and MediaPackage V2 output groups when using Pipeline Locking or Disabled Locking modes. (58a0492c)
client-deadline: AWS Deadline Cloud now supports editing job names and descriptions after submission. (fd6d1d4b)
client-sagemaker: Idle resource sharing enables teams to borrow unused compute resources in your SageMaker HyperPod cluster. This capability maximizes resource utilization by allowing teams to borrow idle compute capacity beyond their allocated compute quotas. (3f52b92b)

For list of updated packages, view updated-packages.md in assets-3.977.0.zip

Open source →

Additional notes

Features

core: update clock skew detection threshold and configs (#8189) (a2773d5)

Bug Fixes

core/protocols: avoid Buffer.slice in return ByteJsonShapeSerializer.flush (#8222) (d4f2aeb)

Chores

codegen: sync for CBOR large map deser, event-streams exceptions, endpoints features, ChecksumStream fix (#8218) (bb564e5)
core/protocols: JSON serde consistency testing and perf tuning (#8214) (8dac251)

Tests

core/httpAuthSchemes: fix test race condition (#8223) (a4dd3de)

Open source →

3.976.021 Jul 2026Deprecated

client-evidently: Deprecate all Evidently API for AWS CloudWatch Evidently deprecation

3.976.0(2026-01-26)

Chores

packages-internal: update metadata url paths (#7679) (c3a351c1)

New Features

client-connectcases: Amazon Connect now enables you to use tag-based access controls to define who can access specific cases. You can associate tags with case templates and configure security profiles to determine which users can access cases with those tags. (cdac71e6)
client-ec2: DescribeInstanceTypes API response now includes an additionalFlexibleNetworkInterfaces field, the number of interfaces attachable to an instance when using flexible Elastic Network Adapter (ENA) queues in addition to the base number specified by maximumNetworkInterfaces. (a5c51fbb)
client-groundstation: Adds support for AWS Ground Station Telemetry. (0d939202)
client-evidently: Deprecate all Evidently API for AWS CloudWatch Evidently deprecation (37a7bdbf)

For list of updated packages, view updated-packages.md in assets-3.976.0.zip

Open source →

Additional notes

Features

client-connectcases: Amazon Connect now enables you to use tag-based access controls to define who can access specific cases. You can associate tags with case templates and configure security profiles to determine which users can access cases with those tags. (cdac71e)
client-ec2: DescribeInstanceTypes API response now includes an additionalFlexibleNetworkInterfaces field, the number of interfaces attachable to an instance when using flexible Elastic Network Adapter (ENA) queues in addition to the base number specified by maximumNetworkInterfaces. (a5c51fb)
client-evidently: Deprecate all Evidently API for AWS CloudWatch Evidently deprecation (37a7bdb)
client-groundstation: Adds support for AWS Ground Station Telemetry. (0d93920)

Open source →

Additional notes

Features

core/protocols: bytebuffer serializer and buffer deserializer for JSON (#8202) (f39955a)

Open source →

3.975.315 Jul 2026

codegen: sync to use typesVersions entries for submodules

Chores

codegen: sync to use typesVersions entries for submodules (#8195) (d43e5bf)
migrate eslint/prettier to oxlint/oxfmt (#8192) (7d14409)

Open source →

3.975.214 Jul 2026

scripts: add typesVersions entries for submodules

Bug Fixes

scripts: add typesVersions entries for submodules (#8186) (9eade26)

Chores

codegen: sync for codegen and include OAuthIAM operation for signin list (#8190) (a20c28d)

Open source →

3.975.18 Jul 2026

core/client: remove TypeScript version user-agent metric

Chores

core/client: remove TypeScript version user-agent metric (#8177) (9d72bc2)

Open source →

3.975.08 Jul 20262 sources agree

codegen: upgrade smithy to 1.66.0

3.975.0(2026-01-23)

Chores

codegen: upgrade smithy to 1.66.0 (#7678) (784b9f3d)
ci: use repo-specific IAM role for PR builds (#7680) (e392336c)

New Features

client-connect: Amazon Connect now offers public APIs to programmatically configure and run automated tests for contact center experiences. Integrate testing into CICD pipelines, run multiple tests at scale, and retrieve results via API to automate validation of voice interactions and workflows. (718c3222)
client-qconnect: Fixes incorrect types in the UpdateAssistantAIAgent API request, adds MESSAGE to TargetType enum, and other minor changes. (30cc5fa9)
client-datazone: Added api for deleting data export configuration for a domain (089a6f1a)

For list of updated packages, view updated-packages.md in assets-3.975.0.zip

Open source →

Additional notes

Features

core/client: propagate w3c trace headers (#8156) (e5f383c)

Chores

codegen: sync for isolatedModules tsconfig and server metrics recorder (#8174) (f8b4987)
use isolatedModules for types (#8164) (f274899)
deps: bump versions which are not code generated (#8171) (7279203)
deps: bump '@smithy/core' to ^3.29.1 (#8167) (8f43c79)

Open source →

3.974.297 Jul 2026

core/client: delete partitions test

Tests

core/client: delete partitions test (#8158) (6e80e26)

Open source →

3.974.286 Jul 2026

core/client: version partitions.ts file

Chores

core/client: version partitions.ts file (#8155) (7aa3c7a)

Open source →

3.974.272 Jul 2026

deps: bump @aws/lambda-invoke-store to ^0.3.0

Bug Fixes

core: remove turbo.json (#8141) (91d738d)

Chores

deps: bump @aws/lambda-invoke-store to ^0.3.0 (#8140) (aeb7e07)

Open source →

3.974.261 Jul 2026

codegen: sync for thinner command classes, endpoint parameter type fix

Chores

codegen: sync for thinner command classes, endpoint parameter type fix (#8136) (c39b676)

Open source →

3.974.2530 Jun 2026

codegen: sync for internal checksum impls and IMDSv2 region fallback

Chores

codegen: sync for internal checksum impls and IMDSv2 region fallback (#8134) (c4b42a4)
packages: clean up remaining react-native dist-cjs instructions (#8128) (00460bb)

Open source →

3.974.2429 Jun 2026

codegen: sync for checksum impls, hostLabel validation

Chores

codegen: sync for checksum impls, hostLabel validation (#8127) (aa94fa0)
scripts: drop bundler support in dist-cjs (use dist-es instead) (#8124) (775bc03)
codegen: sync for CBOR serde performance and retry fixes (#8125) (b6d6a75)

Tests

add tsup/dts and metro bundler compatibility tests (#8122) (88ae83f)

Open source →

3.974.2322 Jun 2026

### Chores * core: update dependencies.

Chores

core: update dependencies.

Open source →

3.974.2217 Jun 2026

core: prebuild before integration and e2e

Tests

core: prebuild before integration and e2e (#8111) (363f3fb)

Open source →

3.974.2115 Jun 2026

scripts: tuning the build graph

Chores

scripts: tuning the build graph (#8095) (67981c5)

Open source →

3.974.209 Jun 2026

core: export legacy root symbols from submodules instead of relative paths

Bug Fixes

core: export legacy root symbols from submodules instead of relative paths (#8086) (abea090)

Open source →

3.974.198 Jun 2026

scripts: update pkg json linting

Chores

scripts: update pkg json linting (#8082) (86792c5)

Open source →

3.974.185 Jun 2026

core/httpAuthSchemes: fix concurrent skew correction

Bug Fixes

core/httpAuthSchemes: fix concurrent skew correction (#8078) (83e4892)

Chores

update author URL in package.json (#8080) (9bd1a86)

Open source →

3.974.173 Jun 2026

client-dynamodb: dynamodb special retry config fixed to be merge-compatible with user-supplied retry config

Bug Fixes

client-dynamodb: dynamodb special retry config fixed to be merge-compatible with user-supplied retry config (#8068) (a569d9c)

Open source →

3.974.162 Jun 2026

codegen: sync for adaptive retry fix, EAI_AGAIN transient error

Chores

codegen: sync for adaptive retry fix, EAI_AGAIN transient error (#8067) (6b082a6)

Open source →

3.974.1528 May 2026

codegen: sync for cyclic file dependency fixes

Chores

codegen: sync for cyclic file dependency fixes (#8051) (7ae617c)

Open source →

3.974.1426 May 2026

### Chores * core: update dependencies.

Chores

core: update dependencies.

Open source →

3.974.1321 May 2026

codegen: update @smithy dependencies

Chores

codegen: update @smithy dependencies (#8038) (0d6242d)

Open source →

3.974.1218 May 2026

core/protocols: make error namespace removal unconditional in JSON RPC

Bug Fixes

core/protocols: make error namespace removal unconditional in JSON RPC (#8031) (7cee4f2)

Open source →

3.974.1115 May 2026withdrawn: Deprecated due to an error deserialization bug in JSON 1.0 protocol services, see https://github.com/aws/aws-sdk-js-v3/pull/8031. Newer version available.

core/client: consolidate packages into core/client

Chores

core/client: consolidate packages into core/client (#8010) (832d9e7)
codegen: sync for browser bundle fixes (#8022) (eabae7d)

Open source →

3.974.1014 May 2026withdrawn: Deprecated due to an error deserialization bug in JSON 1.0 protocol services, see https://github.com/aws/aws-sdk-js-v3/pull/8031. Newer version available.

### Chores * core: update dependencies.

Chores

core: update dependencies.

Open source →

3.974.914 May 2026withdrawn: Deprecated due to an error deserialization bug in JSON 1.0 protocol services, see https://github.com/aws/aws-sdk-js-v3/pull/8031. Newer version available.

core/protocols: corrections for absolute and relative shape id lookup for errors

Bug Fixes

core/protocols: corrections for absolute and relative shape id lookup for errors (#8001) (c9921dc)

Docs

core: package consolidation plan (#8002) (51d1f8c)

Chores

build: set compilation config module type to nodenext (#8018) (893d9e6)
core/util: migrate minor utility functions to core (#8007) (6a0f061)
codegen: dependency version bump (#8008) (9ce20f6)
scripts: add submodule variant api surface parity linting (#8006) (3361fb2)
update smithy/core imports (#7979) (acffbf9)

Open source →

3.974.81 May 2026

core/client: emit warning for Node.js 20.x end-of-support

Chores

core/client: emit warning for Node.js 20.x end-of-support (#7973) (0038376)

Open source →

3.974.729 Apr 2026

codegen: sync for adaptive retry fixes

Chores

codegen: sync for adaptive retry fixes (#7970) (3dfb72b)
xml-builder: manual version bump for 3.972.21 release (#7969) (99bfb4b)

Open source →

3.974.627 Apr 2026

codegen: sync for typed waiter-result values

Chores

codegen: sync for typed waiter-result values (#7965) (e9f8d8a)

Open source →

3.974.523 Apr 2026

codegen: sync for http2 session closure, retry longpoll backoff, and fast-xml-parser version bump

Chores

codegen: sync for http2 session closure, retry longpoll backoff, and fast-xml-parser version bump (#7958) (107aefc)

Open source →

3.974.422 Apr 2026

client-s3: retry errors with 200 status code

Bug Fixes

client-s3: retry errors with 200 status code (#7945) (7d9d8d1)
client-sts: override IDPCommunicationError to be retryable (#7946) (d75e129)

Open source →

3.974.321 Apr 2026

lockfile: update yarn.lock for util-retry resolution version

Bug Fixes

lockfile: update yarn.lock for util-retry resolution version (#7944) (f83dd48)

Chores

core/client: retry behavior control flag (#7943) (f8a0e2e)
codegen: sync for http2 session concurrency fixes (#7942) (273ad5b)

Open source →

3.974.220 Apr 2026

core: replace Object.entries with for-in loops in shape serde

Bug Fixes

core: replace Object.entries with for-in loops in shape serde (#7940) (785e3b2)

Open source →

3.974.117 Apr 2026

core: reduce object allocations in protocol serde

Bug Fixes

core: reduce object allocations in protocol serde (#7939) (d0c9af0)

Open source →

3.974.016 Apr 2026Deprecated

client-marketplace-metering: Customer Identifier parameter deprecation date has been removed. For new implementations, we recommend using the Customer…

3.974.0(2026-01-22)

Chores

codegen:
- add new pkg folder to sdkVersions.properties (#7675) (766beed1)
- sync for http label validation (#7671) (8536efc9)
packages: move package folders for internal pkgs (#7670) (ce66606d)

Documentation Changes

client-marketplace-metering: Customer Identifier parameter deprecation date has been removed. For new implementations, we recommend using the CustomerAWSAccountID. Your current integration will continue to work. When updating your implementation, consider migrating to CustomerAWSAccountID for improved integration. (fa72d80d)
client-verifiedpermissions: Adding documentation to user guide and API documentation for how customers can create new encrypted policy stores by passing in their customer managed key during policy store creation. (6dac27bb)

New Features

clients: update client endpoints as of 2026-01-22 (a8b7e9d8)
client-gamelift: Amazon GameLift Servers Realtime now supports Node.js 24.x runtime on the Amazon Linux 2023 operating system. (fa6e74c6)
client-guardduty: Adding new enum value for ScanStatusReason (a12c8c68)
client-ec2: Add better support for fractional GPU instances in DescribeInstanceTypes API. The new fields, logicalGpuCount, gpuPartitionSize, and workload array enable better GPU resource selection and filtering for both full and fractional GPU instance types. (72b8a1cc)
client-health: Updates the lower range for the maxResults request property for DescribeAffectedEntities, DescribeAffectedEntitiesForOrganization, DescribeEvents, and DescribeEventsForOrganization API request properties. (202b860d)
client-budgets: Add Budget FilterExpression and Metrics fields to DescribeBudgetPerformanceHistory to support more granular filtering options. (5b7d3217)
client-auto-scaling: This release adds support for Amazon EC2 Auto Scaling group deletion protection (ce97b637)
client-dynamodb: Adds additional waiters to Amazon DynamoDB. (55f5f7fd)
packages: support open version ranges for internal packages - move core & types (#7674) (a3cdc641)
config: create config package (#7667) (943761cd)

For list of updated packages, view updated-packages.md in assets-3.974.0.zip

Open source →

Additional notes

Features

client-auto-scaling: This release adds support for Amazon EC2 Auto Scaling group deletion protection (ce97b63)
client-budgets: Add Budget FilterExpression and Metrics fields to DescribeBudgetPerformanceHistory to support more granular filtering options. (5b7d321)
client-dynamodb: Adds additional waiters to Amazon DynamoDB. (55f5f7f)
client-ec2: Add better support for fractional GPU instances in DescribeInstanceTypes API. The new fields, logicalGpuCount, gpuPartitionSize, and workload array enable better GPU resource selection and filtering for both full and fractional GPU instance types. (72b8a1c)
client-gamelift: Amazon GameLift Servers Realtime now supports Node.js 24.x runtime on the Amazon Linux 2023 operating system. (fa6e74c)
client-guardduty: Adding new enum value for ScanStatusReason (a12c8c6)
client-health: Updates the lower range for the maxResults request property for DescribeAffectedEntities, DescribeAffectedEntitiesForOrganization, DescribeEvents, and DescribeEventsForOrganization API request properties. (202b860)
clients: update client endpoints as of 2026-01-22 (a8b7e9d)
config: create config package (#7667) (943761c)
packages: support open version ranges for internal packages - move core & types (#7674) (a3cdc64)

Additional notes

Features

client-dynamodb: performance improvements in JSON serialization (#7933) (c647598)

Chores

upgrade smithy to 1.69.0 (#7932) (560d987)

Open source →

3.973.277 Apr 2026

clients: add AWS retry customizations for DynamoDB, SQS, SFN, SWF

Chores

clients: add AWS retry customizations for DynamoDB, SQS, SFN, SWF (#7922) (4d9c592)
codegen: update for sparse types and retry 2.1 updates (#7916) (b19357a)

Open source →

3.973.2630 Mar 2026

codegen: update smithy package versions