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GO-2026-4529 Cosign considered signatures valid with expired intermediate certificates when transparency log verification is skipped in github.com/sigstore/cosign

🗓️ 23 Feb 2026 18:23:15Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 3 Views

Cosign treats signatures as valid with expired intermediate certificates when transparency log verification is skipped.

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16 Jun 2026 16:44Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.13.7
EPSS0.00197
SSVC
3