CVE-2026-41399: OpenClaw: Gateway WebSocket Denial of Service via unbounded pre-auth upgrades

March 31, 2026 (updated April 28, 2026)

The gateway accepted unbounded concurrent unauthenticated WebSocket upgrades before allocating them to an authenticated session budget.

References

github.com/advisories/GHSA-f44p-c7w9-7xr7
github.com/openclaw/openclaw
github.com/openclaw/openclaw/commit/cb5f7e201f3f86ad70e199ef850e636b4cc457ba
github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7
nvd.nist.gov/vuln/detail/CVE-2026-41399

Code Behaviors & Features

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