Database/Container, Kubernetes & orchestration
cosign / sigstore: A crafted bundle verifies successfully even though the embedded Rekor entry does not reference
CVSS 5.5CVE-2026-22703Container, Kubernetes & orchestrationcurated
Impact
A crafted bundle verifies successfully even though the embedded Rekor entry does not reference the artifact; signature policy bypass
Who can reach it
Malicious image
What to do
Upgrade cosign to 2.6.2/3.0.4+; re-verify admitted images
References
Related entries
- cosign / sigstore: verify-blob-attestation reports "Verified OK" for malformed or mismatched payloadsCVE-2026-39395 · cosign / sigstoreMedium
- cosign / sigstore: Remote image with a malicious attachment DoSes the machine running cosignCVE-2024-29902 · cosign / sigstoreMedium
- cosign / sigstore: Crafted software artifacts DoS the cosign host, affecting all colocated servicesCVE-2024-29903 · cosign / sigstoreMedium
- cosign / sigstore: Expired issuing certificate treated as valid during verificationCVE-2026-24122 · cosign / sigstoreLow
- cosign / sigstore: Cosign can be tricked into claiming a Rekor transparency-log entry exists when it does notCVE-2022-23649 · cosign / sigstoreLow
- cosign / sigstore: Attacker-controlled registry returns unbounded attestations, DoSing the verifierCVE-2023-46737 · cosign / sigstoreLow
This entry is curated: imported from vendor advisories with machine assistance, not yet individually verified. Confirm against your vendor's advisory before acting, and report anything wrong.