OpenClaw up to 2026.2.18 Block Message stripBotMention redos

Summaryinfo

A vulnerability marked as problematic has been reported in OpenClaw up to 2026.2.18. This impacts the function stripBotMention of the component Block Message Handler. This manipulation causes redos. This vulnerability is handled as CVE-2026-22178. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in OpenClaw up to 2026.2.18 and classified as critical. Affected by this vulnerability is the function stripBotMention of the component Block Message Handler. The manipulation with an unknown input leads to a redos vulnerability. The CWE definition for the vulnerability is CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. As an impact it is known to affect integrity, and availability. The summary by CVE is:

OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.

The weakness was released by Sean Nejad as GHSA-c6hr-w26q-c636. The advisory is shared at github.com. This vulnerability is known as CVE-2026-22178 since 01/06/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1449.003 for this issue.

Upgrading to version 2026.2.19 eliminates this vulnerability. Applying the patch 74268489137510b6f6349919d1e197b17290d92c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Artificial Intelligence Software

Name

• OpenClaw

Version

• 2026.2.0
• 2026.2.1
• 2026.2.2
• 2026.2.3
• 2026.2.4
• 2026.2.5
• 2026.2.6
• 2026.2.7
• 2026.2.8
• 2026.2.9
• 2026.2.10
• 2026.2.11
• 2026.2.12
• 2026.2.13
• 2026.2.14
• 2026.2.15
• 2026.2.16
• 2026.2.17
• 2026.2.18

License

• open-source

Website

• Product: https://github.com/openclaw/openclaw/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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