CVE-2026-54787

Published: Jul 31, 2026Modified: Aug 1, 2026

3.1

Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitability: 1.6 / Impact: 1.4

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-324

Use of a Key Past its Expiration Date

The product uses a cryptographic key or password past its expiration date, which diminishes its safety significantly by increasing the timing window for cracking attacks against that key.

References (5)

https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-go/pull/642

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.