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  4. CVE 2026 58504 drawio stored xss on file open via editable0
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Back to active CVEs
Medium · CVSS 6.1CVE-2026-58504

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

Answer in brief

CVE-2026-58504 records a Medium severity (CVSS 6.1) vulnerability in draw.io: Stored XSS on file open via editable=0 sibling cell — patch bypass of CVE-2026-46642. The current sources do not mark it as known exploited. The current feed maps jgraph/drawio (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 21, 2026Updated Sep 29, 2026Source checked Nov 5, 2026First seen by HOL Sep 21, 2026Material review Sep 29, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps jgraph/drawio (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
jgraph/drawiogeneric<30.2.530.2.5

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for jgraph/drawio.
  2. 2Review the reported fix. Update jgraph/drawio to 30.2.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 29, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 21, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79, CWE-116
Source
CVE List V5
Source checked
Nov 5, 2026
References
3 linked sources
Open source record