Medium 6.1Published Sep 21, 2026

CVE-2026-58504draw.io: Stored XSS on file open via editable=0 sibling cell — patch bypass of CVE-2026-46642

Updated under an hour ago (2026-10-19 13:10 UTC)

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Every CVE for jgraph drawio

Exploited in the last 30 days

draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.5, opening or importing a crafted .drawio file can execute attacker-controlled JavaScript in the draw.io origin when selected cells are processed by TextFormatPanel.addFont() in src/main/webapp/js/grapheditor/Format.js. An HTML sibling cell keeps the formatted-label path enabled while an editable=0 plain-text sibling is excluded from the merged selection style but remains in the iteration set. graph.cellRenderer.getLabelValue() returns that plain-text label without HTML encoding, and mxUtils.canConvertHtmlToSvg() parses it as HTML, bypassing the earlier CVE-2026-46642 remediation. Successful exploitation can expose diagram data, browser storage, non-HttpOnly cookies, and same-origin actions available to the victim. This issue is fixed in version 30.2.5.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79, CWE-116
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 29, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

jgraph drawio jgraph:drawio (from the name)	before 30.2.5	CNA record

References

https://github.com/jgraph/drawio/security/advisories/GHSA-c76x-r78m-phwxx-refsource-confirm
https://github.com/jgraph/drawio/commit/7976c02e1b10b1687c028d82782f9f5d90a885d6x-refsource-misc
https://github.com/jgraph/drawio/releases/tag/v30.2.5x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.