CVE-2026-54787

Summary

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 Software

VendorProductVersion RangeStatus
sigstoresigstore-go< 1.2.1affected

Weaknesses

  • CWE-324: CWE-324: Use of a Key Past its Expiration Date

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

Additional References

References