{"id":"CVE-2026-49834","revision":"51562abe5ad4401e955336fde6b8cf85","records":[{"revision":"51562abe5ad4401e955336fde6b8cf85","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-49834","aliases":[],"title":"sigstore-go: Multi-log threshold bypass via single compromised log","description":"sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.0, a verifier configured with WithTransparencyLog(N>1) or WithSignedCertificateTimestamps(N>1) counts verified witnesses per entry or per validation path rather than per log authority, allowing a single compromised transparency log or CT log to satisfy multi-log threshold requirements and defeat the multi-log policy. This issue is fixed in version 1.2.0.","state":0,"publishedAt":"2026-07-17T19:20:06.14+00:00","modifiedAt":"2026-07-17T19:42:17.005+00:00","affected":[{"ecosystem":"Vendor product","name":"sigstore-go","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sigstore\",\n                    \"product\": \"sigstore-go\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.2.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/sigstore/sigstore-go/security/advisories/GHSA-9vcr-p3rj-q5q6","https://github.com/sigstore/sigstore-go/pull/633","https://github.com/sigstore/sigstore-go/commit/dbb07e62623edd5b175fb9dd5a41dcb85a159207","https://github.com/sigstore/sigstore-go/releases/tag/v1.2.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49834","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-49834","identifiers":["CVE-2026-49834"]},"retained":false,"historicalAffected":[]}],"coverage":[]}