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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-41343

19
FAUCET Score

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.

First published: Apr 23, 2026Last modified: Apr 24, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, < 2026.3.31CPE match
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
< 2026.3.31CPE matchmatch criteria
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 23rd percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: openclawFixed in: 2026.3.31

Vendor Advisories (1)

npmGHSA-qcc3-jqwp-5vh2medium

OpenClaw: LINE webhook handler lacks shared pre-auth concurrency budget before signature verification

Apr 2, 2026

References

github.com / openclaw/openclaw/commit/57c47d8c7fbf5a2e70cc4dec2380977968903cad
Patch
github.com / openclaw/openclaw/security/advisories/GHSA-qcc3-jqwp-5vh2
Vendor Advisory
vulncheck.com / advisories/openclaw-denial-of-service-via-line-webhook-handler-pre-auth-concurrency
Third Party Advisory