ci: pin OSS-Fuzz base-builder-python by SHA#29
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Closes Scorecard PinnedDependenciesID alert #32 — `.clusterfuzzlite/ Dockerfile` had `FROM gcr.io/oss-fuzz-base/base-builder-python` with no digest, dropping the Pinned-Dependencies score from 10 to 9 once ClusterFuzzLite landed. - Pin to sha256:9c97273... (current latest at the time of writing). - Add a docker ecosystem block to .github/dependabot.yml so the SHA refreshes weekly without manual updates. The companion alert (#33, `pip3 install .` in build.sh) is dismissed as a false positive — that line installs the local editable package for the fuzz harnesses to import, and there's no PyPI release to hash-pin against. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
cohenrobinson
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May 10, 2026
Cuts a 2.2.1 patch so the in-toto provenance file (#28) and the SHA-pinned OSS-Fuzz base image (#29) ship in a tagged GitHub Release. Both were \`ci:\` commits that release-please skipped. Scorecard's Signed-Releases check will see the provenance bundle in v2.2.1's release assets and lift from 8/10 → 10/10. No source/behaviour change versus v2.2.0 — wheel and sdist bytes are identical apart from version metadata. Release-As: 2.2.1
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Summary
Closes Scorecard
PinnedDependenciesIDalert #32 — `.clusterfuzzlite/Dockerfile` had `FROM gcr.io/oss-fuzz-base/base-builder-python` with no digest, which dropped the Pinned-Dependencies score from 10 → 9 once ClusterFuzzLite landed.Companion alert #33 (`pip3 install .` in `build.sh`) is dismissed as a false positive — that line installs the local editable package for the fuzz harnesses to import; there's no PyPI release to hash-pin against.
Expected Scorecard impact
Pinned-Dependencies 9 → 10. Combined with the Fuzzing 0 → 10 win from PR #28 and the Signed-Releases 8 → 10 once the next release ships with the in-toto provenance file, ceiling lands around 9.0 (Code-Review and Contributors remain structural blockers).
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