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CVE-2026-49834

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-49834

Severity

5.9

Medium

CVSS V3

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Summary

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.

References

Affected packages

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