Vulnerability · Published Jul 1, 2026 · Assigned by GitHub_M

CVE-2026-55886Jodit Editor: Prototype Pollution in Jodit via Jodit.modules.Helpers.set()

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 45% 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 54.8% 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. Versions prior to 4.12.26 are vulnerable to Prototype Pollution through Jodit.modules.Helpers.set(chain, value, obj), which 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. Applications that pass a user-controlled or partially user-controlled key path into Jodit.modules.Helpers.set() could be vulnerable, causing unexpected property injection, logic bypass, denial of service, or secondary security issues. This issue has been fixed in version 4.12.26.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	jodit	4.12.26	GHSA-vpmm-x3fm-qr5c

Affected products (as reported)

Vendor	Product	Versions
xdan	jodit	< 4.12.26

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-vpmm-x3fm-qr5c x_refsource_CONFIRM