How severe is CVE-2026-32040?

No CVSS score has been assigned to CVE-2026-32040 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-32040?

CVE-2026-32040 affects the following packages: openclaw (npm). Ecosystems affected: npm.

How do I fix CVE-2026-32040?

Update openclaw to 2026.2.23 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-32040 is resolved across your whole dependency graph.

How do I detect CVE-2026-32040 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openclaw, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-32040 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2026-32040?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-32040 can be triaged on real exposure rather than presence alone.

Is CVE-2026-32040 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-32040 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-32040?

CVE-2026-32040 has an EPSS (Exploit Prediction Scoring System) score of 0.1%, placing it in the 4th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-32040?

CVE-2026-32040 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2026-32040 published, and has it been updated?

CVE-2026-32040 was published on March 19, 2026 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

CVE-2026-32040 — openclaw

Fix: openclaw/openclaw#24140

CVE-2026-32040 is a Cross-site Scripting (XSS) vulnerability in openclaw. A fix is available for openclaw — see the affected versions and patch details below.

OpenClaw < 2026.2.23 - HTML Injection via Unvalidated Image MIME Type in Data-URL Interpolation

Also known asGHSA-2ww6-868g-2c56

Published

Mar 19, 2026

Updated

Aug 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-32040.

EPSS Exploitation Probability

via FIRST.org ↗

0.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs4th percentile — riskier than 4% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

133other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

openclawnpm

2.5Mdownloads / week

Description

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

Craft a session entry with an image content block where mimeType is set to image/png" onerror="alert(document.domain)
Export the session to HTML
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

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`openclaw`	all versions	2026.2.23`npm install openclaw@2026.2.23`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openclaw, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update openclaw to 2026.2.23 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-32040 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-32040 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2026-32040. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

## 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 m

O3 Security · Impact-Aware SCA

Is CVE-2026-32040 in your dependencies?

O3 Security finds CVE-2026-32040 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

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