# CVE-2026-58263: Jodit Editor: Mutation XSS in jodit clean-html via a MathML/style rawtext carrier

> Attackers can bypass the HTML sanitizer to inject malicious scripts that execute automatically when the editor content is rendered.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Jul 2026
- **Updated:** 31 Jul 2026
- **Also known as:** GHSA-rxcw-mc6f-6hr3

## What is CVE-2026-58263?

CVE-2026-58263 is a high-severity cross-site scripting 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 a built-in file browser & image editor. In versions prior to 4.12.28, the built-in clean-html sanitizer can be bypassed by a MathML/<style> carrier that hides a dangerous element from the sanitizer's element walk, so a no-interaction event handler survives into the editor value, potentially causing Mutation XSS. When an application supplies attacker-influenced HTML to the editor's value-set or insertion paths, the sanitized output still contains a live <img ... onload=...> (or another non-onerror handler such as onfocus). A consumer that renders that output (element.innerHTML = editor.value) executes the handler with no user interaction. This issue has been fixed in version 4.12.28.

Weakness: CWE-83 (Improper Neutralization of Script in Attributes in a Web Page), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-58263?

2 open source packages ship an affected version, including jodit.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `jodit` | npm | All versions | 4.12.28 |
| `jodit` | npm | All versions | 4.12.28 |

## How do I fix CVE-2026-58263?

Upgrade jodit to 4.12.28 or later.

## Is CVE-2026-58263 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58263 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-58263 and fix it if it is affected.

What it is: CVE-2026-58263 is a high-severity cross-site scripting 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58263 exists.

Affected packages and fixed versions:
- jodit (npm): affected all versions; fixed in 4.12.28
- jodit (npm): affected all versions; fixed in 4.12.28

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-58263/ (Markdown: https://insights.sbomify.com/CVE-2026-58263/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-58263
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-58263
- OSV: https://osv.dev/vulnerability/CVE-2026-58263

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-58263/
Summaries are generated and may contain mistakes; the official description above is the record.