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CVE-2026-59891

9.6 · CRITICAL

sigstore-js provides JavaScript libraries for interacting with Sigstore services.

Published Jul 14, 2026CWE-522EPSS 0.47%

Overview

CVE-2026-59891 is a critical-severity vulnerability. It was published on July 14, 2026 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.1, getRegistryCredentials() reads credentials from the Docker config file and selects an entry by checking whether any configured auth key contains the target registry string. Because this is a substring match rather than an exact host match, credentials configured for one registry can be selected for and transmitted to a different registry whose hostname has a substring relationship with a configured auth key. This issue is fixed in version 0.7.1.

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-js/commit/85c58380758b97ce1b74ef470e55cc21f9d3aa89GitHubgithub.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Foci%400.7.1GitHubgithub.com/sigstore/sigstore-js/security/advisories/GHSA-pf56-329r-95rw

How CyberStrike helps

Frequently asked questions

What is CVE-2026-59891?

CVE-2026-59891 is a critical-severity vulnerability. It was published on July 14, 2026 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2026-59891?

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-59891?

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-2026-59891?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-59891 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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