{"id":"CVE-2026-73649","aliases":["GHSA-7gfh-x38p-prh3"],"url":"https://o3.security/vulnerability/CVE-2026-73649","summary":"Velocity.js: Remote Code Execution via property-read to Function constructor (bypass of CVE-2026-44966 fix)","details":"Velocity.js is a JavaScript implementation of the Apache Velocity template engine. Prior to 2.1.7, the earlier fix for CVE-2026-44966 filtered constructor, __proto__, and prototype only in the #set assignment handler in src/compile/set.ts, while property-read expressions in src/compile/references.ts remained unfiltered. The getReferences() flow called getAttributes(), whose property access allowed an attacker-controlled template to traverse constructor.constructor to the JavaScript Function constructor. The #set handler validated only the assignment target and did not inspect the right-hand property-read expression, allowing arbitrary shell commands, environment-variable access, cloud-credential access, and internal-network access in the server process. This issue is fixed in version 2.1.7.","published":"2026-08-13T18:05:31.929Z","modified":"2026-08-15T04:07:25.209902880Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"velocityjs","fixedVersion":"2.1.7"}],"fix":{"url":"https://github.com/shepherdwind/velocity.js/commit/f8e47a6c4607249b9c967d3a1ced959b4dd64dba","label":"shepherdwind/velocity.js@f8e47a6"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73649.json"},{"type":"FIX","url":"https://github.com/shepherdwind/velocity.js/commit/f8e47a6c4607249b9c967d3a1ced959b4dd64dba"},{"type":"FIX","url":"https://github.com/shepherdwind/velocity.js/pull/192"},{"type":"WEB","url":"https://github.com/shepherdwind/velocity.js/releases/tag/v2.1.7"},{"type":"ADVISORY","url":"https://github.com/shepherdwind/velocity.js/security/advisories/GHSA-7gfh-x38p-prh3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73649"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-15T04:07:25.209902880Z"}}