GHSA-39h7-pwv7-rc3x: @excalidraw/excalidraw

Excalidraw vulnerable to XSS via Mermaid sequence diagram labels (KaTeX rendering)

No CVSS score

Published by the GitHub Advisory Database at 24 Apr 2026, 20:41 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
@excalidraw/excalidraw	npm	>=0.18.0, <0.18.1	0.18.1
@excalidraw/mermaid-to-excalidraw	npm	>=0.3.0, <1.1.3	1.1.3

Identifiers

GHSA-39h7-pwv7-rc3x

Weakness (CWE)

CWE-79 · CWE-1395

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS No score.

Timeline

This record came from the full history of the GitHub Advisory Database, published 24 Apr 2026. New records show when each source confirmed them.

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.