{"id":"CVE-2026-44966","aliases":["GHSA-j658-c2gf-x6pq"],"url":"https://o3.security/vulnerability/CVE-2026-44966","summary":"Velocity.js: Prototype Pollution in #set path assignment","details":"Velocity.js is a JavaScript implementation of the Apache Velocity template engine. In 2.1.5 and earlier, a prototype pollution vulnerability was discovered in velocityjs. This issue occurs during the processing of #set directives in Velocity templates. If an application renders a template controlled by an attacker, it is possible to modify Object.prototype, potentially leading to Denial of Service (DoS) or Remote Code Execution (RCE) depending on the server environment.","published":"2026-05-26T21:21:29.986Z","modified":"2026-08-12T03:51:29.325806592Z","cvss":{"score":8.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L"},"epss":{"score":0.00505,"percentile":0.40758,"asOf":"2026-08-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"velocityjs","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44966.json"},{"type":"ADVISORY","url":"https://github.com/shepherdwind/velocity.js/security/advisories/GHSA-j658-c2gf-x6pq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44966"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:29.325806592Z"}}