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.
oryginał ENCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XLocutus
APPLocutus2.0.39 – 3.0.25 (bez)
Powiązane podatności
Locutus: RCE w funkcji create_function() przez brak sanityzacji danych wejściowych
Prototype pollution w bibliotece Locutus (JavaScript stdlibs)
Versions of package locutus before 2.0.12 are vulnerable to prototype Pollution via the php.strings.parse_str ...
Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to version...
Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to version...