OpenClaw < 2026.3.31 - Denial of Service via LINE Webhook Handler Pre-Auth Concurrency
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenClaw | OpenClaw | before 2026.3.31 | 2026.3.31 | Patch available | CNA |
| — | openclaw (npm) | before 2026.3.31 | 2026.3.31 | Patch available | GHSA-qcc3-jqwp-5vh2 |
- OpenClaw VendorOpenClaw Affected before 2026.3.31 Fixed in 2026.3.31 Patch available CNA
- openclaw (npm) Vendor— Affected before 2026.3.31 Fixed in 2026.3.31 Patch available GHSA-qcc3-jqwp-5vh2
Remediation
- Fix · CNA OpenClaw (OpenClaw) Fixed in 2026.3.31
- Fix · GHSA-qcc3-jqwp-5vh2 openclaw (npm) Fixed in 2026.3.31 Advisory →
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
OpenClaw 2026.3.31
18 records Highest priority Priority LOW 18 LOW
Other records, highest priority first
- TI-2026-29937 OpenClaw < 2026.3.31 - Arbitrary Hook Code Execution via OPENCLAW_BUNDLED_HOOKS_DIR Environment Variable OverridePriority LOW 38
- TI-2026-29953 OpenClaw < 2026.3.31 - Remote Code Execution via Node Scope Gate BypassPriority LOW 36
- TI-2026-29936 OpenClaw < 2026.3.31 - Information Disclosure via Control UI Bootstrap JSONPriority LOW 36
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41343
- 2026-10-03 Alias added: GHSA-qcc3-jqwp-5vh2
- 2026-10-25 EPSS moved to the below the 50th percentile
References
More Openclaw vulnerabilities
- TI-2026-25309 OpenClaw < 2026.3.28 Media Parsing Path Traversal to Arbitrary File Read CVSS 4.0HIGH 8.7
- TI-2026-20394 Exposure of resource to wrong sphere in OpenClaw CVSS 3.1HIGH 8.8
- TI-2026-27742 OpenClaw < 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installation CVSS 4.0HIGH 8.4
- TI-2026-27766 OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing CVSS 4.0MEDIUM 6.9
- TI-2026-07315 OpenClaw bluebubbles Webhook monitor.ts handleBlueBubblesWebhookRequest improper authentication CVSS 4.0MEDIUM 6.9
- TI-2026-17789 OpenClaw < 2026.2.22 - Allowlist Bypass via Command Substitution in system.run CVSS 4.0HIGH 7.5
Sources
- CVE-2026-41343 · CVE Program
- CVE-2026-41343 · NVD
- FIRST EPSS
- GHSA-qcc3-jqwp-5vh2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences