CVE-2026-54756 Jodit Editor: Prototype pollution via Jodit.configure() / ConfigMerge
Prototype pollution in Jodit Editor allows attackers to modify Object.prototype via user-controlled configuration, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54756?
CVE-2026-54756 is a medium-severity vulnerability in xdan jodit, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-1321
Which versions are affected by CVE-2026-54756?
2 open source packages ship an affected version, including jodit.
| Package | Affected | Fixed in |
|---|---|---|
jodit npm | All versions | 4.12.18 |
jodit npm | All versions | 4.12.18 |
How do I fix CVE-2026-54756?
Upgrade jodit to 4.12.18 or later.
Is CVE-2026-54756 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54756 exists.
Sources
Also known as GHSA-5957-5c94-3v7w.