{"cve":"CVE-2018-6334","nvd":{"published":"2018-12-31T19:29:00.323","modified":"2026-06-17T02:01:40.953","status":"Modified","description":"Multipart-file uploads call variables to be improperly registered in the global scope. In cases where variables are not declared explicitly before being used this can lead to unexpected behavior. This affects all supported versions of HHVM prior to the patch (3.25.1, 3.24.5, and 3.21.9 and below).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-20","CWE-621"],"references":["https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff","https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html","https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff","https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html"],"products":["facebook:hhvm"],"source":"nvd","synced_at":"2026-10-19T20:54:36.112582389+00:00"},"epss":{"cve":"CVE-2018-6334","score":0.01913,"percentile":0.79824,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}