Vulnerability in Openclaw
CVE-2026-35626
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (51.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
Affected products
- Openclaw — versions 0, 2026.3.22
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-rm59-992w-x2mv (vendor-advisory, Vendor Advisory, third-party-advisory)
- github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87 (Patch, patch)
- github.com/openclaw/openclaw/commit/651dc7450b68a5396a009db78ef9382633707ead (Patch, patch)
- www.vulncheck.com/advisories/openclaw-unauthenticated-resource-exhaustion-via-v… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-35626?
- CVE-2026-35626 is a medium-severity vulnerability in Openclaw, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 5.3/10. Published 2026-04-09.
- How severe is CVE-2026-35626?
- Medium severity. CVSS v3 base score is 5.3 out of 10.