CVE-2026-54787
CVE-2026-54787: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityLow3.1
Low [CVE-2026-54787] Signature bypass allows acceptance of bundles signed with expired keys
CVE-2026-54787Source published Source updated
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. A flaw was found in sigstore-go, a software library used for verifying digital signatures. This vulnerability specifically affects the workflow for self-managed long-lived signing keys that do not use certificates. An attacker who possesses an expired signing key can exploit this by creating and signing software bundles that the system will incorrectly accept as valid. This bypasses the intended security checks…
- Affected products in this advisory
- Red Hat Hardened Images
- Source-reported affected versions
- < 1.2.1
- Source-reported fixed versions
- 1.2.1
- spire1-15-main-1.15.2-0.3.hum1
- cosign-main-3.1.2-0.2.hum1
- spire1-14-main-1.14.7-0.3.hum1
5 more entries in the full advisory.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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