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@dependabot dependabot bot commented on behalf of github Jan 26, 2026

Bumps sigstore from 3.6.5 to 4.2.0.

Release notes

Sourced from sigstore's releases.

v4.2.0

This release fixes a minor security issue in OIDC authentication and a compatibility issue with Fulcio Signed Certificate Timestamps. All users are recommended to upgrade.

Fixed

  • Add state validation to OIDC flow to prevent Cross-site request forgery during OIDC authorization (GHSA-hm8f-75xx-w2vr)
  • verification now ensures that artifact digest documented in bundle and the real digest match (this is a bundle consistency check: bundle signature was always verified over real digest) (#1652)
  • Fix issue with Signed Certificate Timestamp parsing where extensions were not allowed by sigstore-python (1657, 1659)

Changed

  • Update supported public key algorithms (#1604)
  • trust: Update embedded TUF root (#1589)

Removed

  • Removed support for Python 3.9 as it is end-of-life (#1645)
  • Removed unused nonce in Oauth flow (#1649)

v4.1.0

Added

  • cli: Support using other Sigstore instances with --instance URL. New instances are trusted with new top level command trust-instance ROOTFILE. #1548

Changed

  • Added cryptography 46 to list of compatible cryptography releases (#1544)
  • Improved error message when verifying bundles with unsupported log entry versions (#1569)

Fixed

  • cli: Always read/write UTF-8. This fixes an issue on Windows where the platform default encoding was used: the issue has existed for a while, but became more visible with signature bundles that contain rekor2 entries. #1553

... (truncated)

Changelog

Sourced from sigstore's changelog.

[4.2.0]

Fixed

  • Add state validation to OIDC flow to prevent Cross-site request forgery during OIDC authorization (GHSA-hm8f-75xx-w2vr)
  • verification now ensures that artifact digest documented in bundle and the real digest match (this is a bundle consistency check: bundle signature was always verified over real digest) (#1652)
  • Fix issue with Signed Certificate Timestamp parsing where extensions were not allowed by sigstore-python (1657, 1659)

Changed

  • Update supported public key algorithms (#1604)
  • trust: Update embedded TUF root (#1589)

Removed

  • Removed support for Python 3.9 as it is end-of-life (#1645)
  • Removed unused nonce in Oauth flow (#1649)

[4.1.0]

Added

  • cli: Support using other Sigstore instances with --instance URL. New instances are trusted with new top level command trust-instance ROOTFILE. #1548

Changed

  • Added cryptography 46 to list of compatible cryptography releases (#1544)
  • Improved error message when verifying bundles with unsupported log entry versions (#1569)

Fixed

  • cli: Always read/write UTF-8. This fixes an issue on Windows where the platform default encoding was used: the issue has existed for a while, but became more visible with signature bundles that contain rekor2 entries. #1553

... (truncated)

Commits
  • 94818e4 Release 4.2 (#1670)
  • 5e77497 Merge commit from fork
  • ae9caa7 build(deps-dev): update ruff requirement from <0.14.14 to <0.14.15 (#1668)
  • b1e5095 build(deps): bump github/codeql-action in the actions group (#1669)
  • f5feace build(deps): bump the actions group with 2 updates (#1666)
  • 802f96b build(deps): bump sigstore/sigstore-conformance from 0.0.24 to 0.0.25 in the ...
  • 4ba9ca3 build(deps): bump pyasn1 from 0.6.1 to 0.6.2 (#1662)
  • 409fadb build(deps-dev): update ruff requirement from <0.14.13 to <0.14.14 (#1663)
  • b1ef51c build(deps-dev): update ruff requirement from <0.14.12 to <0.14.13 (#1658)
  • e6cc009 Include SCT extension in signature data (#1659)
  • Additional commits viewable in compare view

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Bumps [sigstore](https://github.com/sigstore/sigstore-python) from 3.6.5 to 4.2.0.
- [Release notes](https://github.com/sigstore/sigstore-python/releases)
- [Changelog](https://github.com/sigstore/sigstore-python/blob/main/CHANGELOG.md)
- [Commits](sigstore/sigstore-python@v3.6.5...v4.2.0)

---
updated-dependencies:
- dependency-name: sigstore
  dependency-version: 4.2.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot bot added dependencies Pull requests that update a dependency file python Pull requests that update Python code labels Jan 26, 2026
@hugovk
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hugovk commented Jan 26, 2026

There's a 3.6.7 we could instead:

https://github.com/sigstore/sigstore-python/releases/tag/v3.6.7

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3 participants