Locutus: Remote Code Execution (RCE) in locutus call_user_func_array due to Code Injection

Summary

CVE	CVE-2026-29091
State	PUBLISHED
Assigner	GitHub_M
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-03-06 18:16:20 UTC
Updated	2026-07-15 02:19:24 UTC
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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from ADP

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

EPSS: 0.007860000 probability, percentile 0.520370000 (date 2026-07-18)

Problem Types: CWE-95 | CWE-94 | CWE-95 CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') | CWE-94 Improper Control of Generation of Code ('Code Injection')

Version	Source	Type	Score	Severity	Vector
3.1	ADP	CVSS	8.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
3.1	[email protected]	Secondary	8.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
3.1	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	Secondary	8.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
3.1	CNA	DECLARED	8.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Locutus	Locutus	All	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Locutusjs	Locutus	affected < 3.0.0	Not specified
ADP	Red Hat	Logging Subsystem For Red Hat OpenShift	Not specified	Not specified
ADP	Red Hat	Logging Subsystem For Red Hat OpenShift	Not specified	Not specified
ADP	Red Hat	Logging Subsystem For Red Hat OpenShift	Not specified	Not specified
ADP	Red Hat	Logging Subsystem For Red Hat OpenShift	Not specified	Not specified
ADP	Red Hat	Logging Subsystem For Red Hat OpenShift	Not specified	Not specified
ADP	Red Hat	Logging Subsystem For Red Hat OpenShift	Not specified	Not specified

References

Reference	Source	Link	Tags
github.com/locutusjs/locutus/security/advisories/GHSA-fp25-p6mj-qqg6	134c704f-9b21-4f2e-91b3-4a467353bcc0	github.com	Exploit, Mitigation, Vendor Advisory
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29091.json	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	security.access.redhat.com
bugzilla.redhat.com/show_bug.cgi	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	bugzilla.redhat.com
github.com/locutusjs/locutus/commit/977a1fb169441e35996a1d2465b512322de5...	[email protected]	github.com	Patch
access.redhat.com/security/cve/CVE-2026-29091	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	access.redhat.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Source	Time	Event
ADP	2026-03-06T18:01:08.561Z	Reported to Red Hat.
ADP	2026-03-06T17:48:10.442Z	Made public.

Workarounds

ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

There are currently no legacy QID mappings associated with this CVE.