Sourced from github/codeql-action/init's releases.

v4.38.1

• The CodeQL Action now has experimental support for CodeQL releases for which per-language bundles are available. Per-language bundles support analysis for a single language and are therefore smaller than the combined bundles that allow analysis for all supported languages. As a result, per-language bundles take up less space on disk and are faster to download. We expect to roll this change out to everyone in the coming weeks. #4146

v4.38.0

• On GitHub-hosted runners, the CodeQL Action now deletes unused CodeQL bundles from the toolcache before downloading a different bundle, which frees up disk space for the analysis. We expect to roll this change out to everyone in September. #4124
• The CodeQL Action now supports CodeQL releases that are compatible with Linux Arm64 and downloads the native linux-arm64 CodeQL bundle when available. #4072
• Update default CodeQL bundle version to 2.27.0. #4129

v4.37.9

• Update default CodeQL bundle version to 2.26.4. #4106

v4.37.8

No user facing changes.

v4.37.7

• Update default CodeQL bundle version to 2.26.3. #4085

v4.37.6

• Changed the default filepath for the new remote file address format that was introduced in CodeQL Action 4.37.0 / 3.37.0 to .github/codeql-config.yml to align it with the suggested path that is used elsewhere. #4070

v4.37.5

• Fixed a bug where a network error while streaming the download of the CodeQL bundle could terminate the init Action instead of falling back to downloading the bundle before extracting it. #4061

v4.37.4

• This version of the CodeQL Action adds support for the tools input for the codeql-action/init step to be specified using a github-codeql-tools repository property. This feature will gradually be rolled out following the release of this version. Once rolled out, this allows for the CodeQL CLI version that is used in GitHub-managed workflows, such as Default Setup, to be set to a custom value. For example, customers who run into issues with rate limits when a new CodeQL CLI version is released can set the value to toolcache to always use the CodeQL CLI version that is available in the runner toolcache. For Advanced Setup workflows, the value provided for tools in the workflow definition always takes precedence unless the value of the repository property starts with !. #4037
• Update default CodeQL bundle version to 2.26.2. #4051

v4.37.3

No user facing changes.

v4.37.2

• The new address format for the config-file input that was introduced in CodeQL Action 4.37.0 is now enabled by default. In addition to the format described there, the remote= prefix can now be used to explicitly indicate that the input refers to a remote file. All previous input formats continue to be accepted as well. #4023
• The CodeQL Action can now make use of configured private registries in Default Setup to retrieve CodeQL configuration files from remote repositories that require authentication. This will allow customers to store their CodeQL configuration in a single repository that can then be referenced by Default Setup workflows in other repositories. We expect to roll this and other, related changes out to everyone in July. #4007

v4.37.1

• Upcoming breaking change: Add a deprecation warning for customers using CodeQL version 2.20.6 and earlier. These versions of CodeQL were discontinued on 1 July 2026 alongside GitHub Enterprise Server 3.16, and will be unsupported by the next minor release of the CodeQL Action. #3956
• Update default CodeQL bundle version to 2.26.1. #4019

v4.37.0

• Update default CodeQL bundle version to 2.26.0. #3995
• In addition to the existing input format, the config-file input for the codeql-action/init step will soon support a new [owner/]repo[@ref][:path] format. All components except the repository name are optional. If omitted, owner defaults to the same owner as the repository the analysis is running for, ref to main, and path to .github/codeql-action.yaml. Support for this format ships in this version of the CodeQL Action, but will only be enabled over the coming weeks. #3973

v4.36.3

No user facing changes.

v4.36.2

• Cache CodeQL CLI version information across Actions steps. #3943
• Reduce requests while waiting for analysis processing by using exponential backoff when polling SARIF processing status. #3937
• Update default CodeQL bundle version to 2.25.6. #3948

... (truncated)

Sourced from github/codeql-action/init's changelog.

CodeQL Action Changelog

See the releases page for the relevant changes to the CodeQL CLI and language packs.

[UNRELEASED]

No user facing changes.

4.38.1 - 18 Sept 2026

• The CodeQL Action now has experimental support for CodeQL releases for which per-language bundles are available. Per-language bundles support analysis for a single language and are therefore smaller than the combined bundles that allow analysis for all supported languages. As a result, per-language bundles take up less space on disk and are faster to download. We expect to roll this change out to everyone in the coming weeks. #4146

4.38.0 - 09 Sept 2026

• On GitHub-hosted runners, the CodeQL Action now deletes unused CodeQL bundles from the toolcache before downloading a different bundle, which frees up disk space for the analysis. We expect to roll this change out to everyone in September. #4124
• The CodeQL Action now supports CodeQL releases that are compatible with Linux Arm64 and downloads the native linux-arm64 CodeQL bundle when available. #4072
• Update default CodeQL bundle version to 2.27.0. #4129

4.37.9 - 26 Aug 2026

• Update default CodeQL bundle version to 2.26.4. #4106

4.37.8 - 21 Aug 2026

No user facing changes.

4.37.7 - 13 Aug 2026

• Update default CodeQL bundle version to 2.26.3. #4085

4.37.6 - 04 Aug 2026

• Changed the default filepath for the new remote file address format that was introduced in CodeQL Action 4.37.0 / 3.37.0 to .github/codeql-config.yml to align it with the suggested path that is used elsewhere. #4070

4.37.5 - 03 Aug 2026

• Fixed a bug where a network error while streaming the download of the CodeQL bundle could terminate the init Action instead of falling back to downloading the bundle before extracting it. #4061

4.37.4 - 29 Jul 2026

• This version of the CodeQL Action adds support for the tools input for the codeql-action/init step to be specified using a github-codeql-tools repository property. This feature will gradually be rolled out following the release of this version. Once rolled out, this allows for the CodeQL CLI version that is used in GitHub-managed workflows, such as Default Setup, to be set to a custom value. For example, customers who run into issues with rate limits when a new CodeQL CLI version is released can set the value to toolcache to always use the CodeQL CLI version that is available in the runner toolcache. For Advanced Setup workflows, the value provided for tools in the workflow definition always takes precedence unless the value of the repository property starts with !. #4037
• Update default CodeQL bundle version to 2.26.2. #4051

4.37.3 - 22 Jul 2026

No user facing changes.

4.37.2 - 21 Jul 2026

• The new address format for the config-file input that was introduced in CodeQL Action 4.37.0 is now enabled by default. In addition to the format described there, the remote= prefix can now be used to explicitly indicate that the input refers to a remote file. All previous input formats continue to be accepted as well. #4023

... (truncated)

• 1c5b675 Merge pull request #4152 from github/update-v4.38.1-a65b83a73
• a97cdca Add changelog entry for #4146
• cc6c691 Update changelog for v4.38.1
• a65b83a Merge pull request #4146 from github/henrymercer/per-language-bundles-pr
• 07fa87d Clarify the latest-nightly eligibility exception
• f18f353 Describe the bundle URL resolver
• ecec9b5 Share per-language telemetry fields without renaming
• 79fe3a1 Move download telemetry into the status-report directory
• ead1f7d Rename the platform module
• 549d498 Simplify per-language platform eligibility checks
• Additional commits viewable in compare view

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