CVE-2026-41343 json
OpenClaw < 2026.3.31 - Denial of Service via LINE Webhook Handler Pre-Auth Concurrency
published 7mo ago modified 4mo ago also GHSA-qcc3-jqwp-5vh2 , EUVD-2026-25327
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm openclaw 2026.3.31
- OpenClaw OpenClaw 2026.3.31
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- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | 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 |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| CNA | 4.0 | 6.9 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openclaw | <2026.3.31 |
2026.3.31 |
Affected products
- OpenClaw OpenClaw
Classification
References
-
github.com
/openclaw/openclaw/commit/57c47d8c7fbf5a2e70cc4dec2380977968903cad
patch, web
-
github.com
/openclaw/openclaw/security/advisories/GHSA-qcc3-jqwp-5vh2
vendor-advisory, web
-
vulncheck.com
/advisories/openclaw-denial-of-service-via-line-webhook-handler-pre-auth-concurrency
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-41343
advisory
-
github.com
/openclaw/openclaw
package
-
github.com
/openclaw/openclaw/releases/tag/v2026.3.31
web
Sources
- CVE List CVE-2026-41343
- GitHub Advisory GHSA-qcc3-jqwp-5vh2
- NVD CVE-2026-41343
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