Vulnerability in Openclaw
CVE-2026-41405
OpenClaw before 2026.3.31 parses MS Teams webhook request bodies before performing JWT validation, allowing unauthenticated attackers to trigger resource exhaustion. Remote attackers can send malicious Teams webhook payloads to exhaust server resources by bypassing authentication checks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Openclaw — versions 0, 2026.3.31
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-p464-m8x6-vhv8 (vendor-advisory, Vendor Advisory)
- github.com/openclaw/openclaw/commit/3834d47099dd13c8244ed6de8b9ea9855c553623 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-resource-exhaustion-via-unauthenticated-m… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-41405?
- CVE-2026-41405 is a high-severity vulnerability in Openclaw, classified under CWE-408. CVSS score: 7.5/10. Published 2026-04-28.
- How severe is CVE-2026-41405?
- High severity. CVSS v3 base score is 7.5 out of 10.