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CVE-2026-54787

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
sigstore / sigstore-goaffected < 1.2.1

CWE

CWE-324

References

ADP enrichment

CISA-ADP

No English description supplied.