Vulnerability · Published Jun 10, 2026 · Assigned by GitHub_M
CVE-2026-46642draw.io: XSS via crafted cell label when opening a .drawio file
Medium 6.1
In plain English
A medium-severity cross-site scripting in drawio from jgraph. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Official description
draw.io is a configurable diagramming and whiteboarding application. Prior to version 29.7.12, a crafted .drawio file can execute arbitrary JavaScript in the editor's origin when the file is opened. The vulnerability is not in the label sanitizer (which works correctly on the rendering path) but in a feature-detection routine in the Text Format panel that reads the raw cell label and assigns it to a detached element's innerHTML without sanitization. Browsers fire onerror for failed image loads even on detached elements, so an <img src=x onerror=...> payload in any cell label triggers script execution as soon as the cell is selected — which import does automatically. This issue has been patched in version 29.7.12.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/jgraph/drawio/security/advisories/GHSA-fqhg-287p-c6vf x_refsource_CONFIRM
- https://github.com/jgraph/drawio/releases/tag/v29.7.12 x_refsource_MISC