Openclaw cli: OpenClaw: Voice-call realtime WebSocket accepted oversized frames (CVE-2026-42437)
Description
A vulnerability in the openclaw-cli package versions 2026.4.9 up to but not including 2026.4.10 allows the voice-call realtime WebSocket to accept oversized frames. This can lead to a remote availability impact by potentially disrupting service. The issue is fixed in version 2026.4.10 and later.
CVSS v3.1
Score 7.5high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The openclaw-cli package's voice-call realtime WebSocket path accepted oversized frames, which could cause a remote availability risk for deployments exposing that path. The vulnerability affects versions >=2026.4.9 and <2026.4.10. The fix, implemented in pull request #63890 and commit afadb7dae6738819ad9c7d2597ace0516957d20e, rejects oversized realtime WebSocket frames before processing them. Users are advised to upgrade to version 2026.4.10 or newer, with 2026.4.14 including the fix.
Potential Impact
This vulnerability can be exploited remotely without authentication to send oversized WebSocket frames to the voice-call realtime WebSocket endpoint, causing an availability impact (denial of service) on affected deployments.
Mitigation Recommendations
Upgrade openclaw-cli to version 2026.4.10 or later. The fix is included starting from 2026.4.10, with 2026.4.14 being the latest release containing the patch. No other mitigation is required as the fix properly rejects oversized frames.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BREW-openclaw-cli-CVE-2026-42437
- Osv Schema Version
- 1.7.3
- Ecosystems
- ["Homebrew"]
- Cvss Version
- 3.1
Threat ID: 6ac2459712601ec6a3165d1b
Added to database: 10/04/2026, 12:24:55 UTC
Last enriched: 10/04/2026, 12:43:04 UTC
Last updated: 10/04/2026, 16:08:38 UTC
Views: 1
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