Medium 6.5Published Mar 5, 2026

CVE-2026-28394OpenClaw < 2026.2.15 - Denial of Service via Unbounded Response Parsing in web_fetch Tool

Updated under an hour ago (Oct 26, 2026, 7:20 PM ET)

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It affects OpenClaw. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for OpenClaw

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Mar 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

OpenClaw OpenClaw openclaw:openclaw (from the name)	before 2026.2.15	CNA record
openclaw openclaw openclaw:openclaw	before 2026.2.15	NVD

References

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-p536-vvpp-9mc8	vendor-advisory
https://github.com/openclaw/openclaw/commit/166cf6a3e04c7df42bea70a7ad5ce2b9df46d147	patch
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-response-parsing-in-web-fetch-tool	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.