{"id":"CVE-2026-58504","published":"2026-09-21T17:17:36.077","lastModified":"2026-09-21T17:17:36.077","description":"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.","cvssScore":6.1,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-79","CWE-116"],"vendors":[],"products":[],"references":[{"url":"https://github.com/jgraph/drawio/commit/7976c02e1b10b1687c028d82782f9f5d90a885d6","tags":[]},{"url":"https://github.com/jgraph/drawio/releases/tag/v30.2.5","tags":[]},{"url":"https://github.com/jgraph/drawio/security/advisories/GHSA-c76x-r78m-phwx","tags":[]}],"exploitRefs":[{"url":"https://github.com/jgraph/drawio/commit/7976c02e1b10b1687c028d82782f9f5d90a885d6","tags":[]},{"url":"https://github.com/jgraph/drawio/releases/tag/v30.2.5","tags":[]},{"url":"https://github.com/jgraph/drawio/security/advisories/GHSA-c76x-r78m-phwx","tags":[]}],"hasPoc":true,"ai":{"summary":"A vulnerability allows execution of attacker-controlled JavaScript when processing crafted .drawio files, potentially exposing sensitive data and cookies.","exploitability":"Exploitation requires a user to open or import a malicious .drawio file; moderately difficult due to specific conditions needed for the exploit to succeed.","blast_radius":"If exploited, can lead to significant data exposure including browser storage and same-origin actions.","remediation":"Update to draw.io version 30.2.5 immediately to mitigate this vulnerability.","tags":["rce","data-exposure","web","update"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:23:00.117Z"}}