GHSA-8883-9w57-vwv6 is a medium-severity (CVSS 6.5) CWE-696 vulnerability in openclaw. O3 Security confirms whether GHSA-8883-9w57-vwv6 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
OpenClaw: Mattermost callback dispatch allowed non-allowlisted sender actions
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
openclawnpmDescription
Summary
Mattermost interactive callback dispatch could run action handlers before normal sender authorization checks completed.
Affected Packages / Versions
- Package:
openclaw(npm) - Affected: < 2026.3.22
- Fixed: >= 2026.3.22
- Latest released tag checked:
v2026.3.23-2(630f1479c44f78484dfa21bb407cbe6f171dac87) - Latest published npm version checked:
2026.3.23-2
Fix Commit(s)
a47722de7e3c9cbda8d5512747ca7e3bb8f6ee66
Release Status
The fix shipped in v2026.3.22 and remains present in v2026.3.23 and v2026.3.23-2.
Code-Level Confirmation
- extensions/mattermost/src/mattermost/interactions.ts now requires callback authorization before dispatching actions.
- extensions/mattermost/src/mattermost/monitor.ts routes callback authorization through the same sender and allowlist policy used for normal ingress.
OpenClaw thanks @zpbrent for reporting.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | openclaw | all versions | 2026.3.22 |
Detection & mitigation playbook
Open-source dependencyDetect
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.
Fix
Update openclaw to 2026.3.22 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8883-9w57-vwv6 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 pinpoints whether GHSA-8883-9w57-vwv6 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-8883-9w57-vwv6. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-8883-9w57-vwv6 in your dependencies?
O3 detects GHSA-8883-9w57-vwv6 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.