CVE-2026-33994
- Source
- https://cve.org/CVERecord?id=CVE-2026-33994
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33994.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-33994
- Aliases
- Published
- 2026-03-27T22:15:47Z
- Modified
- 2026-10-21T02:30:16Z
- Severity
-
- 6.3 (Medium) CVSS_V4 - 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 CVSS Calculator
- Summary
- Locutus Prototype Pollution due to incomplete fix for CVE-2026-25521
- Details
-
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_strfunction of the npm package locutus. An attacker can polluteObject.prototypeby overridingRegExp.prototype.testand then passing a crafted query string toparse_str, bypassing the prototype pollution guard. This vulnerability stems from an incomplete fix for CVE-2026-25521. The CVE-2026-25521 patch replaced theString.prototype.includes()-based guard with aRegExp.prototype.test()-based guard. However,RegExp.prototype.testis 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. - Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-1321" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33994.json" }- References
-
- https://github.com/locutusjs/locutus/releases/tag/v3.0.25
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33994.json
- https://github.com/locutusjs/locutus/security/advisories/GHSA-vc8f-x9pp-wf5p
- https://nvd.nist.gov/vuln/detail/CVE-2026-33994
- https://github.com/locutusjs/locutus/commit/345a6211e1e6f939f96a7090bfeff642c9fcf9e4
- https://github.com/locutusjs/locutus/pull/597
Affected packages
Git / github.com/locutusjs/locutus
Affected ranges
- Type
- GIT
- Repo
- https://github.com/locutusjs/locutus
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:locutus:locutus:*:*:*:*:*:node.js:*:*", "range": [ { "introduced": "2.0.39" }, { "fixed": "3.0.25" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "345a6211e1e6f939f96a7090bfeff642c9fcf9e4" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v3.0.25", "range": [ { "fixed": "0d2402bdb92f9c59918114af9c8ba628f22e9152" } ], "source": "REFERENCES_TAG" } ] }