CVE-2026-28394

OpenClaw < 2026.2.15 - Denial of Service via Unbounded Response Parsing in web_fetch Tool

State: Published
Severity: 6.9 Medium
Published: Mar 5, 2026
Updated: Mar 11, 2026
Reserved: Feb 27, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.2.15Affected

References

GitHub Security Advisory (GHSA-p536-vvpp-9mc8)vendor-advisory
Patch Commitpatch
VulnCheck Advisory: OpenClaw < 2026.2.15 - Denial of Service via Unbounded Response Parsing in web_fetch Toolthird-party-advisory

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