{"id":"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.","aliases":["GHSA-j658-c2gf-x6pq"],"modified":"2026-07-08T08:13:29.150569972Z","published":"2026-05-26T21:21:29.986Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-1321"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44966.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/shepherdwind/velocity.js","events":[{"introduced":"0"},{"last_affected":"a74b56073762f47d34a25abed2e1e10118faef02"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"extracted_events":[{"introduced":"0"},{"last_affected":"2.1.5"}],"cpe":"cpe:2.3:a:shepherdwind:velocity.js:*:*:*:*:*:node.js:*:*"}}],"versions":["v2.1.5","v2.1.4","v2.1.3","v2.1.2","v2.1.1","v2.1.0","v2.0.6","v2.0.5","v2.0.4","v2.0.3","v2.0.2","v2.0.1","list","v1.1.5","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.2","v1.0.1","v1.0.0","v0.10.1","0.10.0","v0.9.6","v0.9.5","v0.9.4","v0.9.3","v0.9.2","0.9.1","0.9.0","0.8.5","0.8.4","0.8.2","0.8.0","0.7.5","0.7.4","0.7.3","0.7.2","0.6.0","0.4.10","0.4.9","0.4.8","0.4.7","0.4.5","0.4.4","0.4.2","0.4.1","0.4.0","0.3.16","0.3.15","0.3.14","0.3.13","0.3.12"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44966.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L"}]}