CVE-2026-55886

描述

### Summary `Jodit.modules.Helpers.set(chain, value, obj)` walks the dot-separated `chain`, creating and following each path segment, without filtering prototype-mutating keys. A chain that begins with (or contains) `__proto__`, `constructor`, or `prototype` lets the final assignment reach and mutate `Object.prototype` (prototype pollution). ### Affected - Package: `jodit` (npm) - Versions: `< 4.12.26` - Public API: `Jodit.modules.Helpers.set(chain, value, obj)` ### Proof of Concept ```js const { Jodit } = require('jodit'); delete Object.prototype.polluted; Jodit.modules.Helpers.set('__proto__.polluted', 'yes', {}); console.log(({}).polluted); // "yes" (before the fix) delete Object.prototype.polluted; ``` ### Impact Applications that pass a user-controlled or partially user-controlled key path into `Jodit.modules.Helpers.set()` could be vulnerable to prototype pollution (CWE-1321): unexpected property injection, logic bypass, denial of service, or secondary security issues. ### Patch Fixed in 4.12.26 by rejecting any `chain` whose segments include `__proto__`, `constructor`, or `prototype`, reusing the same guard introduced for `Jodit.configure()` in 4.12.18. ### Credit Responsibly reported by Junming Wu.

如何修補 CVE-2026-55886

要修補 CVE-2026-55886,請將受影響套件升級到下列已修補版本。

• —升級至 4.12.26 或更新版本

CVE-2026-55886 正在被利用嗎?

低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 4.12.26

CVSS 分數

參考連結(2)

• PATCHgithub.com/xdan/jodit
• WEBgithub.com/xdan/jodit/security/advisories/GHSA-vpmm-x3fm-qr5c