CVE-2026-58504: medium-severity vulnerability in jgraph drawio
draw.io: Stored XSS on file open via editable=0 sibling cell — patch bypass of CVE-2026-46642
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.1epss 0.3%
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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
jgraph · drawioRelated CVEs — jgraph drawio
In the same product, most dangerous first.
CVE-2026-76898HIGHdraw.io: Unauthenticated SSRF via IPv6 ULA blocklist bypass in /embed2.jsEPSS 0.4%CVE-2026-63416LOWdraw.io: Path traversal in ExportProxyServlet allows access to arbitrary backend endpointsEPSS 0.3%CVE-2026-63334MEDIUMdraw.io: SSRF via DNS rebinding in ProxyServlet bypasses private IP blocklistEPSS 0.3%CVE-2026-46642MEDIUMdraw.io: XSS via crafted cell label when opening a .drawio fileEPSS 0.2%CVE-2026-42195LOWUnvalidated gitlab URL parameter redirects OAuth authorize step to attacker-controlled hostEPSS 0.2%CVE-2026-63373MEDIUMdraw.io: OAuth CSRF via missing state validation on self-hosted deployments allows session token injectionEPSS 0.2%