CVE-2026-32040
mediumpriority · track · 24EPSS 0.002 · 4 %ileDEEUUSEPSS · scored 2026-10-27
OpenClaw versions prior to 2026.2.23 contain an html injection vulnerability in the HTML session exporter that allows attackers to execute arbitrary javascript by injecting malicious mimeType values in image content blocks. Attackers can craft session entries with specially crafted mimeType attributes that break out of the img src data-URL context to achieve cross-site scripting when exported HTML is opened.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 0.4–6.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (5)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-0490OpenClaw: Mehrere SchwachstellenDeutsch2026-02-23csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in OpenClaw ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen, Cross-Site-Scripting-Angriffe durchzuführen, einen Denial-of-Service-Zustand zu verursachen oder andere nicht näher bezeichnete Angriffe durchzuführen.
- GHSA-2ww6-868g-2c56OpenClaw Vulnerable to HTML injection via unvalidated image MIME type in data-URL interpolation2026-03-03ghsa · osvUS
## 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
also known as (3)
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sources
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references (10)
External citations — patches, advisories, analysis.
- https://github.com/openclaw/openclaw/pull/24140cnnvd
- https://github.com/openclaw/openclaw/releasesPatchcnnvd
- https://github.com/openclaw/openclaw/security/advisories/GHSA-2ww6-868g-2c56cnnvd
- https://www.vulncheck.com/advisories/openclaw-html-injection-via-unvalidated-image-mime-type-in-data-url-interpolationcnnvd
- https://github.com/openclaw/openclaw/pull/24140enisa_euvd
- https://github.com/openclaw/openclaw/security/advisories/GHSA-2ww6-868g-2c56enisa_euvd
- https://www.vulncheck.com/advisories/openclaw-html-injection-via-unvalidated-image-mime-type-in-data-url-interpolationenisa_euvd
- https://github.com/openclaw/openclaw/pull/24140Issue Trackingnvd
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