CVE-2026-41354 is a medium-severity vulnerability in OpenClaw, specifically affecting versions prior to 2026.4.2. This vulnerability allows legitimate events from different conversations or senders to collide due to an insufficient scope in the deduplication of webhook replay keys. The implications are significant, as attackers may leverage this weakness to cause silent message suppression, thereby disrupting bot workflows across chat sessions.
With a CVSS score of 6.3, this vulnerability is classified as medium severity. It highlights a risk to organizations that rely on OpenClaw for managing chat interactions, as the potential for disruption can affect user experience and operational efficiency. Organizations should prioritize patching immediately.
Currently, there is no known public exploit for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) database. However, the lack of active exploitation does not diminish the urgency for defenders to address this issue.
The vulnerability was published on April 23, 2026, and was last modified on May 1, 2026. Organizations using versions of OpenClaw prior to the patched version should take immediate action to mitigate the risk posed by CVE-2026-41354.
Vulnerability Details
OpenClaw before version 2026.4.2 contains an insufficient scope vulnerability in Zalo webhook replay dedupe keys. This weakness allows legitimate events from different conversations or senders to collide, leading to potential silent message suppression and disruption of bot workflows across chat sessions. The CWE classification for this vulnerability is CWE-706.
The CVSS score for this vulnerability is 6.3, indicating a medium severity level. This score is derived from the vulnerability's characteristics, including an attack vector of network and high attack complexity.
The affected product is OpenClaw, and the vendor is OpenClaw. The vulnerability was disclosed by the source identifier disclosure@vulncheck.com.
Technical Analysis
The root cause of CVE-2026-41354 stems from the insufficient scoping of deduplication keys in the Zalo webhook replay mechanism. This flaw allows attackers to exploit weak deduplication, leading to unintended message suppression across various chat sessions.
The attack vector for this vulnerability is classified as network-based, meaning that an attacker can exploit it remotely without the need for physical access to the system. The attack complexity is rated high, indicating that successful exploitation requires specialized knowledge and potentially multiple steps.
This vulnerability does not require any privileges, nor does it necessitate user interaction. However, it does pose a low impact on availability, as the exploitation may lead to message suppression without affecting the overall functionality of the OpenClaw platform.
Risk & Impact Analysis
Organizations using OpenClaw are at risk due to the potential for message suppression, which can disrupt bot workflows and affect user satisfaction. The silent nature of this disruption can make it particularly challenging to detect and remediate.
The urgency to address this vulnerability is medium, as it could lead to significant operational disruption if left unpatched. Organizations should assess their deployment of OpenClaw and prioritize remediation efforts to mitigate the risks associated with this vulnerability.
The low availability impact indicates that while the system remains operational, the effectiveness of the bot workflows may be compromised. Organizations should consider the blast radius of this vulnerability, particularly in environments where reliable messaging is critical.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of OpenClaw prior to 2026.4.2 are affected by this vulnerability. Organizations should ensure they upgrade to the latest version to mitigate the risk.
Mitigation & Remediation
To remediate CVE-2026-41354, organizations should immediately upgrade OpenClaw to version 2026.4.2 or later. This patch addresses the insufficient scope vulnerability in the webhook replay deduplication process.
If immediate patching is not feasible, organizations should implement network controls to segment access to the OpenClaw service and monitor for unusual message behavior that may indicate exploitation attempts.
Detection Guidance
Organizations should monitor logs for any anomalies in message traffic that could indicate the exploitation of this vulnerability. Behavioral anomalies in bot workflows across chat sessions may also serve as indicators of compromise.
AppSecure Threat Intelligence Insight
CVE-2026-41354 highlights the ongoing challenge of ensuring adequate scoping in webhook implementations. Security teams should learn from this incident to reinforce their webhook security practices.
Organizations are encouraged to stay up-to-date with security advisories from vendors and to regularly audit their systems for vulnerabilities similar to this one.
Penetration testing can also play a crucial role in identifying such weaknesses before they can be exploited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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