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TI-2026-42103 Aliases CVE-2026-58504

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

Priority MEDIUM 60CWE-116Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

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 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0025 16th percentileScored 2026-11-07
Fix Fixed drawio (jgraph): 30.2.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
jgraphdrawiobefore 30.2.530.2.5Patch availableCNA
  • drawio Vendorjgraph Affected before 30.2.5 Fixed in 30.2.5 Patch available CNA

Remediation

  • Fix · CNA drawio (jgraph) Fixed in 30.2.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58504

References

Other 3

  • TI-2023-03691 OS Command Injection in jgraph/drawio CVSS 3.1CRITICAL 9.8
  • TI-2023-03690 OS Command Injection in jgraph/drawio CVSS 3.1CRITICAL 9.8
  • TI-2026-53724 draw.io: Unauthenticated SSRF via IPv6 ULA blocklist bypass in /embed2.js CVSS 4.0HIGH 7.7
  • TI-2023-03178 Denial of Service in jgraph/drawio CVSS 3.1HIGH 7.5
  • TI-2026-83372 Search path hijacking in draw.io Desktop on Windows CVSS 3.1HIGH 7.8
  • TI-2023-02834 Cross-site Scripting (XSS) - Stored in jgraph/drawio CVSS 3.1MEDIUM 6.1
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences