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CVE-2026-29091

8.1 · HIGH

Locutus brings stdlibs of other programming languages to JavaScript for educational purposes.

Published Mar 6, 2026CWE-95EPSS 1.02%

Overview

CVE-2026-29091 is a high-severity vulnerability. It was published on March 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to version 3.0.0, a remote code execution (RCE) flaw was discovered in the locutus project, specifically within the call_user_func_array function implementation. The vulnerability allows an attacker to inject arbitrary JavaScript code into the application's runtime environment. This issue stems from an insecure implementation of the call_user_func_array function (and its wrapper call_user_func), which fails to properly validate all components of a callback array before passing them to eval(). This issue has been patched in version 3.0.0.

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/locutusjs/locutus/commit/977a1fb169441e35996a1d2465b512322de500adGitHubgithub.com/locutusjs/locutus/security/advisories/GHSA-fp25-p6mj-qqg6Refaccess.redhat.com/security/cve/CVE-2026-29091Refbugzilla.redhat.com/show_bug.cgi?id=2445262GitHubgithub.com/locutusjs/locutus/security/advisories/GHSA-fp25-p6mj-qqg6Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29091.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-29091?

CVE-2026-29091 is a high-severity vulnerability. It was published on March 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-29091?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-29091?

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-2026-29091?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-29091 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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