CVE-2026-35626
OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhook
- State
- Published
- Severity
- 6.9 Medium
- Published
- Apr 9, 2026
- Updated
- Jun 23, 2026
- Reserved
- Apr 4, 2026
Description
OpenClaw before 2026.3.22 contains an unauthenticated resource exhaustion vulnerability in voice call webhook handling that buffers request bodies before provider signature checks. Attackers can send large or malicious webhook requests to exhaust server resources without authentication by bypassing signature validation.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | VulnCheck |
Weaknesses
- CWE-405 Asymmetric Resource Consumption (Amplification)
Affected Products
| Product | Versions |
|---|---|
OpenClawOpenClaw |
|
References
- GitHub Security Advisory (GHSA-rm59-992w-x2mv)vendor-advisory
- Patch Commit #1patch
- Patch Commit #2patch
- VulnCheck Advisory: OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhookthird-party-advisory
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