CVE-2026-44966— Velocity.js: Prototype Pollution in #set path assignment
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| shepherdwind | velocity.js | <= 2.1.5 | affected |
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I. Basic Information for CVE-2026-44966
Vulnerability Information
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Vulnerability Title
Velocity.js: Prototype Pollution in #set path assignment
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
Velocity.js 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Velocity.js是Eward个人开发者的一个JavaScript实现的Apache Velocity模板引擎。 Velocity.js 2.1.5及之前版本存在安全漏洞，该漏洞源于处理#set指令时存在原型污染，攻击者可通过控制模板修改Object.prototype，可能导致拒绝服务或远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| shepherdwind | velocity.js | <= 2.1.5 | - |
II. Public POCs for CVE-2026-44966
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-44966 (1)
IV. Related Vulnerabilities
Same weakness: CWE-1321
- CVE-2026-46510
Prototype pollution in form-data-objectizer via bracket-nota - CVE-2026-46509
deepobj: Improperly Controlled Modification of Object Protot - CVE-2026-44483
RVF: Prototype pollution in @rvf/set-get reachable via @rvf/ - CVE-2026-9101
Prototype pollution in csv parsing - CVE-2026-8657
jsondiffpatch 安全漏洞
V. Comments for CVE-2026-44966
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