sigstore: default blob attestation verification to SLSA provenance v1#1060
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crazy-max merged 1 commit intodocker:mainfrom Apr 8, 2026
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Signed-off-by: CrazyMax <[email protected]>
tonistiigi
approved these changes
Apr 7, 2026
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relates to https://github.com/docker/github-builder/actions/runs/24074179428/job/70218412185#step:14:65
Cosign used to silently ignore the missing predicate type in this path, but 3.0.6 started enforcing it ( see sigstore/cosign#4801) and fails with:
Our signed provenance blobs are SLSA v1 attestations, so defaulting verification to
slsaprovenance1fixes the regression without forcing every caller to pass an obvious constant.