CVE-2026-39395: fallo de gravedad media en sigstore cosign
Cosign's verify-blob-attestation reports false positive when payload parsing fails
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 4.3epss 0.3%
Cosign provides code signing and transparency for containers and binaries. Prior to 3.0.6 and 2.6.3, cosign verify-blob-attestation may erroneously report a "Verified OK" result for attestations with malformed payloads or mismatched predicate types. For old-format bundles and detached signatures, this was due to a logic flaw in the error handling of the predicate type validation. For new-format bundles, the predicate type validation was bypassed completely. This vulnerability is fixed in 3.0.6 and 2.6.3.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Productos afectados
sigstore · cosignCVEs relacionadas — sigstore cosign
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-29903MEDIUMCosign vulnerable to machine-wide denial of service via malicious artifactsEPSS 0.9%CVE-2023-46737LOWPossible endless data attack from attacker-controlled registry in cosignEPSS 0.7%CVE-2022-35929HIGHFalse positive signature verification in cosignEPSS 0.7%CVE-2024-29902MEDIUMCosign vulnerable to system-wide denial of service via malicious attachmentsEPSS 0.7%CVE-2026-24122LOWCosign Certificate Chain Expiry Validation Issue Allows Issuing Certificate Expiry to Be OverlookedEPSS 0.2%CVE-2022-23649LOWImproper Certificate Validation in CosignEPSS 0.2%