{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54787","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-15T23:23:57.714Z","datePublished":"2026-07-31T21:58:14.156Z","dateUpdated":"2026-07-31T23:36:13.441Z"},"containers":{"cna":{"title":"sigstore-go fails to check signature timestamps against a signing key's validity period","problemTypes":[{"descriptions":[{"cweId":"CWE-324","lang":"en","description":"CWE-324: Use of a Key Past its Expiration Date","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm"},{"name":"https://github.com/sigstore/sigstore-go/pull/642","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/sigstore-go/pull/642"},{"name":"https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f"},{"name":"https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1"}],"affected":[{"vendor":"sigstore","product":"sigstore-go","versions":[{"version":"< 1.2.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-31T21:58:14.156Z"},"descriptions":[{"lang":"en","value":"sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1."}],"source":{"advisory":"GHSA-wqqc-jjcq-vfxm","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-31T23:35:40.966529Z","id":"CVE-2026-54787","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-31T23:36:13.441Z"}}]}}