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MEDIUM severity

OpenClaw's Chrome extension relay binds publicly due to wildcard treated as loopbackGHSA-qw99-grcx-4pvm

MEDIUMFix: openclaw/openclaw@8d75a49

GHSA-qw99-grcx-4pvm is a medium-severity (CVSS 6.5) CWE-1327 vulnerability in openclaw. A fix is available for openclaw — see the affected versions and patch details below.

Also known asCVE-2026-28395
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • 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 GHSA-qw99-grcx-4pvm.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs40th percentile — riskier than 40% of all scored CVEsHighest risk
0.00%0.40%0.81%1.21%0.2%0.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

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
2.9Mdownloads / week

Description

Summary

The Chrome extension relay (ensureChromeExtensionRelayServer) previously treated wildcard hosts (0.0.0.0 / ::) as loopback, which could make it bind the relay HTTP/WS server to all interfaces when a wildcard cdpUrl was passed.

Impact

If configured with a wildcard cdpUrl, relay HTTP endpoints could become reachable off-host, leaking service presence/port and enabling DoS/brute-force traffic against the relay token header.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected: >= 2026.1.14-1 < 2026.2.12

Fixed Versions

  • Patched: >= 2026.2.12 (released 2026-02-13)

Fix Commit(s)

  • 8d75a496bf5aaab1755c56cf48502d967c75a1d0

Notes

  • Earlier hardening for /json* auth and /cdp token checks landed in:
    • a1e89afcc19efd641c02b24d66d689f181ae2b5c

Thanks @qi-scape for reporting.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmopenclaw≥ 2026.1.14-1&&< 2026.2.122026.2.12npm install openclaw@2026.2.12

Affected Products

1 product · 1 configurations
Application
openclawopenclaw
≥ 2026.1.14-1 && < 2026.2.12
range

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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update openclaw to 2026.2.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qw99-grcx-4pvm is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

## Summary The Chrome extension relay (`ensureChromeExtensionRelayServer`) previously treated wildcard hosts (`0.0.0.0` / `::`) as loopback, which could make it bind the relay HTTP/WS server to all interfaces when a wildcard `cdpUrl` was passed. ## Impact If configured with a wildcard `cdpUrl`, relay HTTP endpoints could become reachable off-host, leaking service presence/port and enabling DoS/brute-force traffic against the relay token header. ## Affected Packages / Versions - Package: `openclaw` (npm) - Affected: `>= 2026.1.14-1 < 2026.2.12` ## Fixed Versions - Patched: `>= 2026.2.12` (re
O3 Security · Impact-Aware SCA

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OpenClaw's Chrome extension relay binds publicly due to…