How severe is CVE-2026-29091?

CVE-2026-29091 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-29091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-29091?

CVE-2026-29091 affects Locutus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-29091?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-29091 have an EU (EUVD) identifier?

Yes. CVE-2026-29091 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10051.

When was CVE-2026-29091 published?

CVE-2026-29091 was published on 2026-03-06 and last updated on 2026-06-30.

CVE-2026-29091

CVE-2026-29091 is a high-severity vulnerability in Locutus with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-95.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10051
Weakness: CWE-95
Affected product: Locutus
Published: 2026-03-06
Last modified: 2026-06-30

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.

Frequently asked questions

What is CVE-2026-29091?: 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.
How severe is CVE-2026-29091?: CVE-2026-29091 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-29091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-29091?: CVE-2026-29091 affects Locutus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-29091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-29091 have an EU (EUVD) identifier?: Yes. CVE-2026-29091 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10051.
When was CVE-2026-29091 published?: CVE-2026-29091 was published on 2026-03-06 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:locutus:locutus:*:*:*:*:*:node.js:*:*

More vulnerabilities in Locutus

CVE-2026-33994 — Critical (CVSS 9.8): Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Starting in version…
CVE-2026-33993 — Critical (CVSS 9.8): Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to version 3.0.25,…
CVE-2026-32304 — Critical (CVSS 9.8): Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to 3.0.14, the…
CVE-2020-7719 — Critical (CVSS 9.8): Versions of package locutus before 2.0.12 are vulnerable to prototype Pollution via the php.strings.parse_str function.
CVE-2026-25521 — High (CVSS 8.8): Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. In versions from 2.0.12…
CVE-2021-23392 — Medium (CVSS 5.3): The package locutus before 2.0.15 are vulnerable to Regular Expression Denial of Service (ReDoS) via the…

All CVEs affecting Locutus →

Other CWE-95 (Eval Injection) vulnerabilities

CVE-2026-44643 — Critical (CVSS 10.0): Angular Expressions provides expressions for the Angular.JS web framework as a standalone module. Prior to 1.5.2, an…
CVE-2025-68271 — Critical (CVSS 10.0): OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems.…
CVE-2013-10070 — Critical (CVSS 10.0): PHP-Charts v1.0 contains a PHP code execution vulnerability in wizard/url.php, where user-supplied GET parameter names…
CVE-2022-36010 — Critical (CVSS 10.0): This library allows strings to be parsed as functions and stored as a specialized component,…
CVE-2026-1470 — Critical (CVSS 9.9): n8n contains a critical Remote Code Execution (RCE) vulnerability in its workflow Expression evaluation system.…
CVE-2023-29511 — Critical (CVSS 9.9): XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user with…

Browse all CWE-95 (Eval Injection) vulnerabilities →