Security Advisory

CVE-2026-54787

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-31 21:58:14

Last updated 2026-07-31 23:36:13

Assigner GitHub_M

CVSS score not scored

State PUBLISHED

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.

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