OpenClaw is vulnerable to unauthenticated resource exhaustion through its voice call webhook handling

Summary

Voice Call webhook handling buffered request bodies before provider signature checks, enabling bounded unauthenticated resource exhaustion.

Affected Packages / Versions

• Package: openclaw (npm)
• Affected: < 2026.3.22
• Fixed: >= 2026.3.22
• Latest released tag checked: v2026.3.23-2 (630f1479c44f78484dfa21bb407cbe6f171dac87)
• Latest published npm version checked: 2026.3.23-2

Fix Commit(s)

• 651dc7450b68a5396a009db78ef9382633707ead

Release Status

The fix shipped in v2026.3.22 and remains present in v2026.3.23 and v2026.3.23-2.

Code-Level Confirmation

• extensions/voice-call/src/webhook.ts now enforces header gating and shared pre-auth body caps before reading attacker-controlled request bodies.
• extensions/voice-call/src/webhook.test.ts ships regression coverage for missing-signature, oversize, and timeout pre-auth webhook cases.

OpenClaw thanks @SEORY0 for reporting.