CVE-2026-44966

Velocity.js has a Prototype Pollution vulnerability through #set path assignment

Published 26 May 2026Modified 24 Jul 2026CWE 1321

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

GHSA8.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by GHSA (high).

Description

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.

Affected packages and fixed versions

Source	Package	Fixed in
npm::GitHub Security Advisory npm	velocityjs	no fix listed

References

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