@excalidraw/excalidraw Cross-site Scripting vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2023-26140: 0.56% estimated exploitation activity in the next 30 days; percentile 46.71 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact XSS vulnerability due to improperly sanitizing URLs of links that can be attached on canvas elements. This affects users of the npm package @excalidraw/excalidraw provided it was deployed in environments where untrusted user input in drawings that are then shared with third parties is a concern. If you only hosted the editor in trusted environments, or sharing didn't take place, the impact is minimized. Patches Patch is available on version 0.15.3 and up (stable), or latest @excalidraw/excalidraw@next (unstable releases). Workarounds No workaround without upgrading unless deployed in environments without untrusted user input. References https://security.snyk.io/vuln/SNYK-JS-EXCALIDRAWEXCALIDRAW-5841658 https://github.com/excalidraw/excalidraw/pull/6728

Published by the source

16 Aug 2023, 21:00 UTC

Last modified by the source

8 Nov 2023, 04:11 UTC

Source last checked

26 Oct 2026, 12:24 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-v7v8-gjv7-ffmr

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-v7v8-gjv7-ffmr

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# Patch Next advisory brief: CVE-2023-26140

Advisory: @excalidraw/excalidraw Cross-site Scripting vulnerability
IDs: CVE-2023-26140, GHSA-v7v8-gjv7-ffmr
Record: https://patchnext.com/advisories/cve-2023-26140 (revision 2, source checked 26 Oct 2026, 12:24 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @excalidraw/excalidraw 0.15.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @excalidraw/excalidraw: affected < 0.15.3; fixed in 0.15.3

## Suggested inspection (read-only)
- `npm ls @excalidraw/excalidraw --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @excalidraw/excalidraw.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-v7v8-gjv7-ffmr (OSV record GHSA-v7v8-gjv7-ffmr lists affected ranges: npm @excalidraw/excalidraw >=0 <0.15.3 (fixed))
- Verified: https://github.com/advisories/GHSA-v7v8-gjv7-ffmr (GitHub-reviewed advisory GHSA-v7v8-gjv7-ffmr lists affected ranges: npm @excalidraw/excalidraw >=0 <0.15.3)

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