CVE-2026-49834
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.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-25)
- CWE
- CWE-347
- Published
- Modified
- Record from
- the NVD, synced
Affected
- sigstore:sigstore-go
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9vcr-p3rj-q5q6 | Go | github.com/sigstore/sigstore-go | <1.2.0 | 1.2.0 |
| GO-2026-5952 | Go | github.com/sigstore/sigstore-go | <1.2.0 | 1.2.0 |