PatchSiren cyber security CVE debrief
CVE-2026-49834 sigstore CVE debrief
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-17T20:17:21.963Z and has not been modified since then. The sigstore-go library, used for Sigstore signing and verification, had a vulnerability prior to version 1.2.0. A verifier configured with WithTransparencyLog(N>1) or WithSignedCertificateTimestamps(N>1) could have its multi-log threshold requirements defeated by a single compromised transparency log or CT log. This issue was fixed in version 1.2.0. Users of sigstore-go library prior to version 1.2.0 should verify their configurations and update to the latest version to mitigate potential risks.
- Vendor
- sigstore
- Product
- sigstore-go
- CVSS
- MEDIUM 5.9
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-17
- Original CVE updated
- 2026-07-17
- Advisory published
- 2026-07-17
- Advisory updated
- 2026-07-17
Who should care
Users of sigstore-go library prior to version 1.2.0 should verify their configurations and update to the latest version to mitigate potential risks. This includes operators, platform administrators, vulnerability management teams, and security teams who may be impacted by the vulnerability.
Technical summary
The sigstore-go library, used for Sigstore signing and verification, had a vulnerability prior to version 1.2.0. A verifier configured with WithTransparencyLog(N>1) or WithSignedCertificateTimestamps(N>1) could have its multi-log threshold requirements defeated by a single compromised transparency log or CT log. This issue was fixed in version 1.2.0. The vulnerability affects users of sigstore-go library prior to version 1.2.0.
Defensive priority
Medium priority due to the CVSS score of 5.9 and the potential impact on the security of sigstore-go users.
Recommended defensive actions
- Update sigstore-go to version 1.2.0 or later
- Review and verify configurations for WithTransparencyLog and WithSignedCertificateTimestamps
- Monitor for potential security advisories and updates from sigstore-go
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
Evidence notes
The CVE record and NVD detail provide information on the vulnerability and its fix. Users should review the official records and take necessary actions to mitigate potential risks. The vulnerability affects users of sigstore-go library prior to version 1.2.0. It is recommended to verify configurations and update to the latest version. The issue was fixed in version 1.2.0. The CVE record and NVD detail provide information on the vulnerability and its fix.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-17T20:17:21.963Z and has not been modified since then.