CVE-2026-54787

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.

CVSS v3 3.1 LOW

3.1^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.6 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f
https://github.com/sigstore/sigstore-go/pull/642
https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1
https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm
https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-31 23:17

Updated : 2026-09-10 20:30

NVD link : CVE-2026-54787

Mitre link : CVE-2026-54787

CVE.ORG link : CVE-2026-54787

JSON object : View

Products Affected

No product.

CWE

CWE-324

Use of a Key Past its Expiration Date

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