{"id":"CVE-2026-58504","title":"draw.io is a configurable diagramming and whiteboarding application","summary":"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 …","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79","CWE-116"],"vendor":"jgraph","product":"drawio","affected":["drawio < 30.2.5"],"published":"2026-09-21","updated":"2026-09-21","sourceUpdated":"2026-09-21T17:17:36.077","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-58504","references":[{"url":"https://github.com/jgraph/drawio/commit/7976c02e1b10b1687c028d82782f9f5d90a885d6","label":"security-advisories@github.com"},{"url":"https://github.com/jgraph/drawio/releases/tag/v30.2.5","label":"security-advisories@github.com"},{"url":"https://github.com/jgraph/drawio/security/advisories/GHSA-c76x-r78m-phwx","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-21T16:49:07.874Z","slug":"CVE-2026-58504","body":"## Overview\n\ndraw.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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}