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Vulnerability record · CVE-2026-29091 · published 6 March 2026

CVE-2026-29091: Locutus code injection vulnerability

Locutus · Locutus

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.

8.1 CVSS 3.1 High EPSS 0.98% · top 39.3% CWE-95 · CWE-95CWE-94 · Code injection
8.1CVSS 3.1 base score
0.98%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
15 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/locutusjs/locutus/commit/977a1fb169441e35996a1d2465b512322de500ad Patch
https://github.com/locutusjs/locutus/security/advisories/GHSA-fp25-p6mj-qqg6 ExploitMitigationVendor Advisory
https://access.redhat.com/security/cve/CVE-2026-29091
https://bugzilla.redhat.com/show_bug.cgi?id=2445262
https://github.com/locutusjs/locutus/security/advisories/GHSA-fp25-p6mj-qqg6 ExploitMitigationVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29091.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-29091), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.