Vulnerability · Published Jul 1, 2026 · Assigned by GitHub_M

CVE-2026-54756Jodit Editor: Prototype pollution via Jodit.configure() / ConfigMerge

Medium 6.3

In plain English

A medium-severity prototype pollution in jodit from xdan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.3Medium

Exploit odds (30 days)0.5%top 59.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Jodit Editor is a WYSIWYG editor with written in pure TypeScript file and image editing capabilities. In versions prior to 4.12.18, Jodit.configure(options) — and the internal ConfigMerge / ConfigProto helpers — merged user-supplied options into the editor configuration without filtering prototype-mutating keys, potentially causing a Prototype Pollution vulnerability. A payload nested under an existing plain-object option such as controls could reach and mutate Object.prototype. Applications that pass user-controlled or partially user-controlled configuration into Jodit.configure() may be vulnerable. This issue was fixed in version 4.12.18.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	jodit	4.12.18	GHSA-5957-5c94-3v7w

Affected products (as reported)

Vendor	Product	Versions
xdan	jodit	< 4.12.18

Weakness: CWE-1321 · 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

References

https://github.com/xdan/jodit/security/advisories/GHSA-5957-5c94-3v7w x_refsource_CONFIRM