Vulnerability in Openclaw
CVE-2026-41343
OpenClaw before 2026.3.31 lacks a shared pre-auth concurrency budget on the public LINE webhook path, allowing attackers to cause transient availability loss. Remote attackers can flood the webhook endpoint with concurrent requests before signature verification to exhaust resources and degrade service availability.
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: 0.008 (55.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.1% 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: 0.008 · change: +0.003
Affected products
- Openclaw — versions 0, 2026.3.31
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-qcc3-jqwp-5vh2 (vendor-advisory, Vendor Advisory)
- github.com/openclaw/openclaw/commit/57c47d8c7fbf5a2e70cc4dec2380977968903cad (Patch, patch)
- www.vulncheck.com/advisories/openclaw-denial-of-service-via-line-webhook-handle… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-41343?
- CVE-2026-41343 is a medium-severity vulnerability in Openclaw, classified under CWE-799. CVSS score: 5.3/10. Published 2026-04-23.
- How severe is CVE-2026-41343?
- Medium severity. CVSS v3 base score is 5.3 out of 10.