Resource exhaustion in OpenClaw - CVE-2026-28394
Published: May 4, 2026
Vulnerability identifier: #VU129456
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-28394
CWE-ID: CWE-400
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 uncontrolled resource consumption in the web_fetch tool when parsing attacker-controlled web pages with oversized response bodies or pathological HTML nesting. A remote attacker can trick a user or automation into fetching a malicious url to cause a denial of service.
User interaction or automated use of the web_fetch feature is required.
How to mitigate CVE-2026-28394
Install security update from vendor's website.