{"id":"CVE-2026-49834","sourceIdentifier":"security-advisories@github.com","published":"2026-07-17T20:17:21.963","lastModified":"2026-10-24T20:10:00.137","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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."},{"lang":"es","value":"sigstore-go es una biblioteca Go para la firma y verificación de Sigstore. Antes de la versión 1.2.0, un verificador configurado con WithTransparencyLog(N>1) o WithSignedCertificateTimestamps(N>1) cuenta los testigos verificados por entrada o por ruta de validación en lugar de por autoridad de registro, lo que permite que un único registro de transparencia comprometido o registro CT satisfaga los requisitos de umbral de múltiples registros y anule la política de múltiples registros. Este problema está solucionado en la versión 1.2.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"sigstore","product":"sigstore-go","versions":[{"version":"< 1.2.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":3.6},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-17T19:42:04.325650Z","id":"CVE-2026-49834","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-347"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:sigstore:sigstore-go:*:*:*:*:*:*:*:*","versionEndExcluding":"1.2.0","matchCriteriaId":"32612C95-153D-41B3-B1B1-73DB379EE873"}]}]}],"references":[{"url":"https://github.com/sigstore/sigstore-go/commit/dbb07e62623edd5b175fb9dd5a41dcb85a159207","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/sigstore/sigstore-go/pull/633","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/sigstore/sigstore-go/releases/tag/v1.2.0","source":"security-advisories@github.com","tags":["Product","Release Notes"]},{"url":"https://github.com/sigstore/sigstore-go/security/advisories/GHSA-9vcr-p3rj-q5q6","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}