CVE-2026-33993
- Source
- https://cve.org/CVERecord?id=CVE-2026-33993
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33993.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-33993
- Aliases
- Published
- 2026-03-27T22:14:03.495Z
- Modified
- 2026-07-15T01:49:02.475808214Z
- Severity
-
- 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Locutus has Prototype Pollution via __proto__ Key Injection in unserialize()
- Details
-
Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to version 3.0.25, the
unserialize()function inlocutus/php/var/unserializeassigns 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 inparse_str(GHSA-f98m-q3hr-p5wq, GHSA-rxrv-835q-v5mh) —unserializeis a different function with no mitigation applied. Version 3.0.25 patches the issue. - Database specific
{ "cwe_ids": [ "CWE-1321" ], "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33993.json" }- References
-
- https://github.com/locutusjs/locutus/releases/tag/v3.0.25
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33993.json
- https://github.com/locutusjs/locutus/security/advisories/GHSA-4mph-v827-f877
- https://nvd.nist.gov/vuln/detail/CVE-2026-33993
- 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
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
{ "cpe": "cpe:2.3:a:locutus:locutus:*:*:*:*:*:node.js:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "3.0.25" } ], "source": [ "CPE_RANGE", "REFERENCES" ] }