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CVE-2026-54787

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-54787

Severity

3.1

Low

CVSS V3

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Summary

sigstore-go fails to check signature timestamps against a signing key's validity period

Description

sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1.

References

Affected packages

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