GHSA-fh32-73r9-rgh5
MEDIUMGHSA-fh32-73r9-rgh5 is a medium-severity (CVSS 5.8) CWE-639 vulnerability in openclaw. O3 Security confirms whether GHSA-fh32-73r9-rgh5 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
OpenClaw: Trailing-dot localhost CDP hosts could bypass remote loopback protections
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
openclawnpmDescription
Summary
Before OpenClaw 2026.4.2, remote CDP discovery could return a trailing-dot localhost host such as localhost. and bypass OpenClaw's loopback-host normalization. That let a non-loopback remote CDP profile pivot the follow-up connection back onto localhost.
Impact
A hostile discovery response could retarget authenticated browser control toward a localhost-resolving endpoint on the OpenClaw host. This weakened the existing remote-CDP loopback protection and could expose localhost-backed browser state.
Affected Packages / Versions
- Package:
openclaw(npm) - Affected versions:
<= 2026.4.1 - Patched versions:
>= 2026.4.2 - Latest published npm version:
2026.4.1
Fix Commit(s)
9c22d636697336a6b22b0ae24798d8b8325d7828— normalize localhost absolute-form CDP hosts before loopback checks
Release Process Note
The fix is present on main and is staged for OpenClaw 2026.4.2. Publish this advisory after the 2026.4.2 npm release is live.
Thanks @smaeljaish771 for reporting.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | openclaw | all versions | 2026.4.2 |
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 2026.4.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fh32-73r9-rgh5 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-fh32-73r9-rgh5 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-fh32-73r9-rgh5. 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-fh32-73r9-rgh5 in your dependencies?
O3 detects GHSA-fh32-73r9-rgh5 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.