PT-2026-37009 · Openclaw · Openclaw

G0Oduser · CVE-2026-42437 · Published 2026-04-17 · Updated 2026-05-05

Positive Technologies (AI Summary)

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions OpenClaw version 2026.4.9

Description A denial of service issue exists in the voice-call realtime WebSocket path. The system accepts oversized frames without proper validation, allowing remote attackers to send these frames to cause service unavailability for deployments that expose the webhook path.

Recommendations Update to version 2026.4.10 or newer.

Exploit

Fix

Resource Exhaustion

Allocation of Resources Without Limits

Weakness Enumeration

CWE-400

CWE-770

Related Identifiers

CVE-2026-42437

GHSA-VW3H-Q6XQ-JJM5

Affected Products

Openclaw

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42437.json · Exploit
• https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e · Patch
• https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-vw3h-q6xq-jjm5 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42437 · Security Note
• https://osv.dev/vulnerability/CVE-2026-42437 · Vendor Advisory
• https://github.com/openclaw/openclaw · Note
• https://github.com/openclaw/openclaw/pull/63890 · Note
• https://vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path · Note