CVE-2026-28394
OpenClaw < 2026.2.15 - Denial of Service via Unbounded Response Parsing in web_fetch Tool
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
OpenClaw versions prior to 2026.2.15 contain a denial of service vulnerability in the web_fetch tool that allows attackers to crash the Gateway process through memory exhaustion by parsing oversized or deeply nested HTML responses. Remote attackers can social-engineer users into fetching malicious URLs with pathological HTML structures to exhaust server memory and cause service unavailability.
| CWE | CWE-770 |
| Vendor | openclaw |
| Product | openclaw |
| Published | Mar 5, 2026 |
| Last Updated | Mar 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
OpenClaw / OpenClaw
0 < 2026.2.15
References
github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-p536-vvpp-9mc8 github.com: https://github.com/openclaw/openclaw/commit/166cf6a3e04c7df42bea70a7ad5ce2b9df46d147 vulncheck.com: https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-response-parsing-in-web-fetch-tool
Credits
🔍 Vincent Koc (@vincentkoc)