CVE-2026-41343

OpenClaw < 2026.3.31 - Denial of Service via LINE Webhook Handler Pre-Auth Concurrency

State: Published
Severity: 6.9 Medium
Published: Apr 23, 2026
Updated: Apr 24, 2026
Reserved: Apr 20, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	VulnCheck
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	VulnCheck

Weaknesses

CWE-799 Improper Control of Interaction Frequency

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.3.31Affected 2026.3.31Not affected

References

GitHub Security Advisory (GHSA-qcc3-jqwp-5vh2)vendor-advisory
Patch Commitpatch
VulnCheck Advisory: OpenClaw < 2026.3.31 - Denial of Service via LINE Webhook Handler Pre-Auth Concurrencythird-party-advisory

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