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CVE-2026-111172— @casl/ability 6.7.5 before 7.0.2 Prototype Pollution via rulesToFields setByPath

Quick assessment

Affected
stalniy @casl/ability
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

@casl/ability 在 6.7.5 至 7.0.2 版本之间存在原型链污染漏洞，该漏洞位于 函数中。攻击者可以通过点号分隔的条件键（例如 ）修改继承的内置对象。当攻击者能够控制规则条件时，可利用此类键篡改进程范围内的共享内置函数，从而导致 Node.js 进程拒绝服务（Denial of Service）。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
stalniy @casl/ability 6.7.5< 7.0.2 affected
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I. Basic Information for CVE-2026-111172

Vulnerability Information
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Vulnerability Title
@casl/ability 6.7.5 before 7.0.2 Prototype Pollution via rulesToFields setByPath
Source: CVE Program / CVE List V5
Vulnerability Description
@casl/ability 6.7.5 before 7.0.2 contains a prototype pollution vulnerability in rulesToFields() that allows attackers to modify inherited builtins via dotted condition keys. Attackers controlling rule conditions can supply keys like 'toString.call' to alter shared builtin functions process-wide, causing denial of service for the Node.js process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
stalniy @casl/ability 6.7.5 ~ 7.0.2 -

II. Public POCs for CVE-2026-111172

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III. Intelligence Information for CVE-2026-111172

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Patches & Fixes for CVE-2026-111172 (3)

Vendor Advisories for CVE-2026-111172 (1)

Vendor Pages for CVE-2026-111172 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1321

V. Comments for CVE-2026-111172

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