CVE-2026-35623
Received Received - Intake
Missing Rate Limiting in OpenClaw Webhook Enables Brute-Force Access

Publication date: 2026-04-09

Last updated on: 2026-04-16

Assigner: VulnCheck

Description
OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in webhook authentication that allows attackers to brute-force weak webhook passwords without throttling. Remote attackers can repeatedly submit incorrect password guesses to the webhook endpoint to compromise authentication and gain unauthorized access.
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Meta Information
Published
2026-04-09
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-35623
EUVD
EUVD-2026-21105
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.3.25 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-307 The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
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Executive Summary

This vulnerability exists in OpenClaw versions before 2026.3.25 and involves a missing rate limiting mechanism in the webhook authentication process.

Because there is no throttling, attackers can repeatedly submit incorrect password guesses to the webhook endpoint, allowing them to brute-force weak webhook passwords.

Successful exploitation can lead to compromised authentication and unauthorized access.

Impact Analysis

The vulnerability allows remote attackers to gain unauthorized access by brute-forcing weak webhook passwords.

This unauthorized access can lead to potential compromise of the system or data accessible through the webhook.

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