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CVE-2026-54787

3.1 · LOW

sigstore-go is a Go library for Sigstore signing and verification.

Published Jul 31, 2026CWE-324EPSS 0.13%

Overview

CVE-2026-54787 is a low-severity vulnerability. It was published on July 31, 2026 and has a CVSS 3.1 base score of 3.1 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5fGitHubgithub.com/sigstore/sigstore-go/pull/642GitHubgithub.com/sigstore/sigstore-go/releases/tag/v1.2.1GitHubgithub.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxmGitHubgithub.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm

How CyberStrike helps

Frequently asked questions

What is CVE-2026-54787?

CVE-2026-54787 is a low-severity vulnerability. It was published on July 31, 2026 and has a CVSS 3.1 base score of 3.1 (LOW).

How severe is CVE-2026-54787?

This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-54787?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-54787?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-54787 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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