CVE-2026-24122: Signatures considered valid with certificates that outlive expired CA certificates

Signatures considered valid with certificates that outlive expired CA certificates

F-COSIGN-001-003

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

Recorded evidence

3.7low

CVE-2026-24122CVEsigstore/cosign

Signatures considered valid with certificates that outlive expired CA certificates

Fixed in: cosign 3.0.5

patched

details

Finding IDs: F-COSIGN-001-003
CVE: CVE-2026-24122
GHSA: GHSA-wfqv-66vq-46rm
Status: patched
Fixed in: cosign 3.0.5
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVE registry state: PUBLISHED
CVE state checked: 23 Sep 2026
Upstream title: Signatures considered valid with certificates that outlive expired CA certificates
Upstream CWE: CWE-295
Upstream publication: 19 Feb 2026
Upstream updated: 19 Feb 2026
Metadata fetched: 23 Sep 2026
Upstream @1seal credit: @1seal: reporter (accepted)

F-COSIGN-001-003: Verification failures. Certificate validation does not enforce the issuing CA validity boundary. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-COSIGN-001-003

Security area (1seal assessment): Identity. Certificate validation does not enforce the issuing CA validity boundary. Reviewed 24 Sep 2026.

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How this page groups evidence

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