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5 vulnerabilities by locutusjs
CVE-2026-33994 (GCVE-0-2026-33994)
Vulnerability from cvelistv5 – Published: 2026-03-27 22:15 – Updated: 2026-04-01 13:45
VLAI?
Title
Locutus Prototype Pollution due to incomplete fix for CVE-2026-25521
Summary
Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Starting in version 2.0.39 and prior to version 3.0.25, a prototype pollution vulnerability exists in the `parse_str` function of the npm package locutus. An attacker can pollute `Object.prototype` by overriding `RegExp.prototype.test` and then passing a crafted query string to `parse_str`, bypassing the prototype pollution guard. This vulnerability stems from an incomplete fix for CVE-2026-25521. The CVE-2026-25521 patch replaced the `String.prototype.includes()`-based guard with a `RegExp.prototype.test()`-based guard. However, `RegExp.prototype.test` is itself a writable prototype method that can be overridden, making the new guard bypassable in the same way as the original — trading one hijackable built-in for another. Version 3.0.25 contains an updated fix.
Severity ?
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2026-33993 (GCVE-0-2026-33993)
Vulnerability from cvelistv5 – Published: 2026-03-27 22:14 – Updated: 2026-03-30 15:45
VLAI?
Title
Locutus has Prototype Pollution via __proto__ Key Injection in unserialize()
Summary
Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to version 3.0.25, the `unserialize()` function in `locutus/php/var/unserialize` assigns deserialized keys to plain objects via bracket notation without filtering the `__proto__` key. When a PHP serialized payload contains `__proto__` as an array or object key, JavaScript's `__proto__` setter is invoked, replacing the deserialized object's prototype with attacker-controlled content. This enables property injection, for...in propagation of injected properties, and denial of service via built-in method override. This is distinct from the previously reported prototype pollution in `parse_str` (GHSA-f98m-q3hr-p5wq, GHSA-rxrv-835q-v5mh) — `unserialize` is a different function with no mitigation applied. Version 3.0.25 patches the issue.
Severity ?
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
| URL | Tags | |||||||||||||
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CVE-2026-32304 (GCVE-0-2026-32304)
Vulnerability from cvelistv5 – Published: 2026-03-12 21:24 – Updated: 2026-03-13 13:12
VLAI?
Title
Locutus: RCE via unsanitized input in create_function()
Summary
Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to 3.0.14, the create_function(args, code) function passes both parameters directly to the Function constructor without any sanitization, allowing arbitrary code execution. This is distinct from CVE-2026-29091 which was call_user_func_array using eval() in v2.x. This finding affects create_function using new Function() in v3.x. This vulnerability is fixed in 3.0.14.
Severity ?
9.8 (Critical)
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
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CVE-2026-29091 (GCVE-0-2026-29091)
Vulnerability from cvelistv5 – Published: 2026-03-06 17:48 – Updated: 2026-03-06 18:34
VLAI?
Title
Locutus: Remote Code Execution (RCE) in locutus call_user_func_array due to Code Injection
Summary
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.
Severity ?
8.1 (High)
CWE
- CWE-95 - Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Assigner
References
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CVE-2026-25521 (GCVE-0-2026-25521)
Vulnerability from cvelistv5 – Published: 2026-02-04 21:20 – Updated: 2026-02-05 14:31
VLAI?
Title
Locutus is vulnerable to Prototype Pollution
Summary
Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. In versions from 2.0.12 to before 2.0.39, a prototype pollution vulnerability exists in locutus. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using String.prototype. This issue has been patched in version 2.0.39.
Severity ?
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-25521",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-05T14:23:07.184247Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-05T14:31:43.203Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "locutus",
"vendor": "locutusjs",
"versions": [
{
"status": "affected",
"version": "\u003e= 2.0.12, \u003c 2.0.39"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. In versions from 2.0.12 to before 2.0.39, a prototype pollution vulnerability exists in locutus. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using String.prototype. This issue has been patched in version 2.0.39."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 9.4,
"baseSeverity": "CRITICAL",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1321",
"description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-04T21:20:32.643Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/locutusjs/locutus/security/advisories/GHSA-rxrv-835q-v5mh",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/locutusjs/locutus/security/advisories/GHSA-rxrv-835q-v5mh"
},
{
"name": "https://github.com/locutusjs/locutus/commit/042af9ca7fde2ff599120783e720a17f335bb01c",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/locutusjs/locutus/commit/042af9ca7fde2ff599120783e720a17f335bb01c"
}
],
"source": {
"advisory": "GHSA-rxrv-835q-v5mh",
"discovery": "UNKNOWN"
},
"title": "Locutus is vulnerable to Prototype Pollution"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-25521",
"datePublished": "2026-02-04T21:20:32.643Z",
"dateReserved": "2026-02-02T18:21:42.487Z",
"dateUpdated": "2026-02-05T14:31:43.203Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}