Expected behavior violation in OpenClaw - #VU125271
Published: April 8, 2026
Vulnerability identifier: #VU125271
CSH Severity: Medium
CVSS v4.0: 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:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-440
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to expected behavior violation in Zalo webhook replay deduplication logic when processing webhook events from different chats or senders. A remote attacker can send webhook events that collide across chat or sender dimensions to cause a denial of service.
The issue can silently suppress legitimate messages and disrupt bot workflows across conversations.
Remediation
Install security update from vendor's website.