Jodit has prototype pollution via Jodit.configure() / ConfigMerge
Summary
Jodit.configure(options) — and the internal ConfigMerge / ConfigProto helpers — merged user-supplied options into the editor configuration without filtering prototype-mutating keys. A payload nested under an existing plain-object option such as controls could reach and mutate Object.prototype (prototype pollution).
Affected
- Package:
jodit(npm) - Versions:
< 4.12.18 - Public API:
Jodit.configure(options)
Proof of Concept
import { Jodit } from 'jodit';
delete Object.prototype.polluted;
Jodit.configure(JSON.parse('{"controls":{"__proto__":{"polluted":"yes"}}}'));
console.log(({}).polluted); // "yes" (before the fix)
delete Object.prototype.polluted;Impact
Applications that pass user-controlled or partially user-controlled configuration into Jodit.configure() could be vulnerable to prototype pollution: unexpected property injection, logic bypass, denial of service, or secondary security issues.
Patch
Fixed in 4.12.18 by rejecting __proto__, constructor, and prototype at every merge level in ConfigMerge and ConfigProto.
Credit
Responsibly reported by Junming Wu.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | jodit | < 4.12.18 | 4.12.18 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
jodit- Disclosed
- 31.07.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-5957-5c94-3v7w - CC BY 4.0
Vulnerability history: jodit
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 09.2022 07.2026
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 6
Disclosures per year
- 2022: 1
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 5
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Jodit has prototype pollution via Jodit.configure() / ConfigMerge this entry
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