Vulnerability details
CVE-2026-42437
OpenClaw OpenClaw
OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path
CVSS 4.0
8.2High
Official description
OpenClaw versions 2026.4.9 before 2026.4.10 contain a denial of service vulnerability in the voice-call realtime WebSocket path that accepts oversized frames without proper validation. Remote attackers can send oversized WebSocket frames to cause service unavailability for deployments exposing the voice-call realtime WebSocket path.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.2High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| OpenClaw | OpenClaw | 2026.4.9 ≤ v < 2026.4.10 | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5 vendor-advisory
- https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e patch
- https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path third-party-advisory
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Details
- Published
- 2026-05-05
- Last updated
- 2026-05-26
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.41%
Probability of exploitation in 30 days
35.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-770Allocation of Resources Without Limits or Throttling