{"id":"CVE-2026-54787","revision":"76627bbd46a64706953c83b4d02c64a6","records":[{"revision":"76627bbd46a64706953c83b4d02c64a6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-54787","aliases":[],"title":"sigstore-go fails to check signature timestamps against a signing key's validity period","description":"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.","state":0,"publishedAt":"2026-07-31T21:58:14.156+00:00","modifiedAt":"2026-07-31T23:36:13.441+00:00","affected":[{"ecosystem":"Vendor product","name":"sigstore-go","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sigstore\",\n                    \"product\": \"sigstore-go\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.2.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","score":3.1,"severity":"LOW"}],"references":["https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm","https://github.com/sigstore/sigstore-go/pull/642","https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f","https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54787","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-54787","identifiers":["CVE-2026-54787"]},"retained":false,"historicalAffected":[]}],"coverage":[]}