draw.io: XSS via crafted cell label when opening a .drawio file

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.

Scores

EPSS (exploitation in 30 days)

0.22% · top 87% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• jgraph · drawio

  • affected < 29.7.12

References (2)

• https://github.com/jgraph/drawio/security/advisories/GHSA-fqhg-287p-c6vf (opens in a new tab)x_refsource_CONFIRMexploit
• https://github.com/jgraph/drawio/releases/tag/v29.7.12 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-46642](https://trackcve.app/badge/CVE-2026-46642.svg)](https://trackcve.app/cve/CVE-2026-46642)

Record last updated 11 Jun 2026, 14:03 UTC.