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📦 npm

GHSA-r294-2894-92j3

OpenClaw has stored XSS in exported session HTML viewer via markdown/raw-HTML rendering

Published
Mar 3, 2026
Updated
Mar 4, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected

Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.

openclawnpm
4.3Mdownloads / week

Description

Summary

The exported session HTML viewer allowed stored XSS when untrusted session content included raw HTML markdown tokens or unescaped metadata fields.

Impact

Opening a crafted exported HTML session could execute attacker-controlled JavaScript in the viewer context. This can expose session content in the page and enable phishing or UI spoofing in the trusted export view.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected versions: <= 2026.2.22-2
  • Patched version (released): >= 2026.2.23

Technical Details

The exporter rendered markdown with marked.parse(...) and inserted HTML via innerHTML, but did not override the html renderer token path. Raw HTML (for example <img ... onerror=...>) was passed through. Additional tree/header metadata fields were interpolated without escaping in the export template.

Reproduction

  1. Create a session containing content like <img src=x onerror=alert(1)>.
  2. Export the session to HTML.
  3. Open the exported file.
  4. Observe script execution from injected content.

Remediation

  • Added a marked html(token) renderer override that escapes raw HTML tokens.
  • Escaped previously unescaped tree/header metadata fields in the export template.
  • Added image MIME sanitization for exported data-URL image rendering.
  • Added regression tests for markdown/token and metadata escaping paths.

Fix Commit(s)

  • f8524ec77a3999d573e6c6b8a5055bf35c49a2e6

Release Process Note

patched_versions is pre-set to the released version (>= 2026.2.23). This advisory now reflects released fix version 2026.2.23.

OpenClaw thanks @allsmog for reporting.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmopenclawall versions2026.2.23

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openclaw. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update openclaw to 2026.2.23 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r294-2894-92j3 is resolved across your whole dependency graph.

  3. 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.

  4. How O3 protects you

    O3 pinpoints whether GHSA-r294-2894-92j3 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-r294-2894-92j3. 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 exported session HTML viewer allowed stored XSS when untrusted session content included raw HTML markdown tokens or unescaped metadata fields. ## Impact Opening a crafted exported HTML session could execute attacker-controlled JavaScript in the viewer context. This can expose session content in the page and enable phishing or UI spoofing in the trusted export view. ## Affected Packages / Versions - Package: `openclaw` (npm) - Affected versions: `<= 2026.2.22-2` - Patched version (released): `>= 2026.2.23` ## Technical Details The exporter rendered markdown with `marked.pa
O3 Security · Impact-Aware SCA

Is GHSA-r294-2894-92j3 in your dependencies?

O3 detects GHSA-r294-2894-92j3 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.