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PatchSiren cyber security CVE debrief

CVE-2026-46642 jgraph CVE debrief

CVE-2026-46642 is a vulnerability in draw.io, a configurable diagramming and whiteboarding application. Prior to version 29.7.12, a crafted .drawio file can execute arbitrary JavaScript in the editor's origin when the file is opened. The vulnerability is not in the label sanitizer (which works correctly on the rendering path) but in a feature-detection routine in the Text Format panel that reads the raw cell label and assigns it to a detached element's innerHTML without sanitization. Browsers fire onerror for failed image loads even on detached elements, so an <img src=x onerror=...> payload in any cell label triggers script execution as soon as the cell is selected — which import does automatically.

Vendor
jgraph
Product
drawio
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-16
Advisory published
2026-06-10
Advisory updated
2026-06-16

Who should care

Users of draw.io, particularly those who open .drawio files from untrusted sources, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability exists in a feature-detection routine in the Text Format panel of draw.io. When a .drawio file with a crafted cell label is opened, the raw cell label is assigned to a detached element's innerHTML without sanitization. This allows an attacker to execute arbitrary JavaScript in the editor's origin.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to version 29.7.12 or later
  • Be cautious when opening .drawio files from untrusted sources

Evidence notes

CVE-2026-46642 has a CVSS score of 6.1 and is classified as MEDIUM severity. The vulnerability was published on 2026-06-10T18:17:06.007Z and modified on 2026-06-11T14:16:28.880Z.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46642 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46642

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46642 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46642

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.