Resource exhaustion in OpenClaw - CVE-2026-28461
Published: April 8, 2026
Vulnerability identifier: #VU125104
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-28461
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the Zalo webhook endpoint when handling unauthenticated requests with varying query strings on the same valid webhook route. A remote attacker can send repeated requests with churned query-string keys to cause a denial of service.
The issue can lead to memory pressure, process instability, or out-of-memory conditions.
Affected software
OpenClaw
How to mitigate CVE-2026-28461
Install security update from vendor's website.
OpenClaw - update to 2026.3.1