GHSA-2ww6-868g-2c56

Suggest an improvement
Source
https://github.com/advisories/GHSA-2ww6-868g-2c56
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-2ww6-868g-2c56/GHSA-2ww6-868g-2c56.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-2ww6-868g-2c56
Aliases
  • CVE-2026-32040
Downstream
Published
2026-03-03T18:30:39Z
Modified
2026-03-30T13:32:22.044863Z
Severity
  • 4.6 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
  • 2.4 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
Summary
OpenClaw Vulnerable to HTML injection via unvalidated image MIME type in data-URL interpolation
Details

Summary

The HTML session exporter (src/auto-reply/reply/export-html/template.js) interpolates img.mimeType directly into <img src="data:..."> attributes without validation or escaping. A crafted mimeType value (e.g., x" onerror="alert(1)) can break out of the attribute context and execute arbitrary JavaScript.

Impact

An attacker who can control image entries in session data (via crafted tool results or session manipulation) can achieve XSS when the exported HTML is opened. The precondition is tighter than the main XSS finding (requires image content blocks with a malicious mimeType), but exploitation is straightforward.

Affected components

  • src/auto-reply/reply/export-html/template.js — line 1032 (tool result images), line 1306 (user message images)

Reproduction

  1. Craft a session entry with an image content block where mimeType is set to image/png" onerror="alert(document.domain)
  2. Export the session to HTML
  3. Open the exported HTML — the injected onerror fires

Remediation

  • Added sanitizeImageMimeType() helper that validates mimeType against a whitelist of known image MIME types
  • Falls back to application/octet-stream for unrecognized values, preventing attribute breakout

Fix

https://github.com/openclaw/openclaw/pull/24140

Database specific 
{
    "cwe_ids": [
        "CWE-79"
    ],
    "github_reviewed": true,
    "nvd_published_at": "2026-03-19T22:16:40Z",
    "severity": "LOW",
    "github_reviewed_at": "2026-03-03T18:30:39Z"
}
References

Affected packages

npm / openclaw

Package

Name
openclaw
View open source insights on deps.dev
Purl
pkg:npm/openclaw

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2026.2.23

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-2ww6-868g-2c56/GHSA-2ww6-868g-2c56.json"