{"id":"EUVD-2026-16890","revision":"0b9c597cb45d4fe5bfa7e8c23edeea04","records":[{"revision":"0b9c597cb45d4fe5bfa7e8c23edeea04","observedAt":"2026-11-01T06:05:13.899+00:00","statement":{"source":"euvd","id":"EUVD-2026-16890","aliases":["CVE-2026-33994","GHSA-vc8f-x9pp-wf5p"],"title":"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 …","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","score":6.3,"severity":null}],"references":["https://github.com/locutusjs/locutus/security/advisories/GHSA-vc8f-x9pp-wf5p","https://github.com/locutusjs/locutus/pull/597","https://github.com/locutusjs/locutus/commit/345a6211e1e6f939f96a7090bfeff642c9fcf9e4","https://github.com/locutusjs/locutus/releases/tag/v3.0.25"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-16890","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Mar 27, 2026, 10:15:47 PM","dateUpdated":"Apr 1, 2026, 1:45:55 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-16890","identifiers":["EUVD-2026-16890","CVE-2026-33994","GHSA-vc8f-x9pp-wf5p"]},"retained":false,"historicalAffected":[]}],"coverage":[]}