HOMEVULNERABILITIESCVE-2026-28394
MEDIUM

CVE-2026-28394

CWE-770Published: March 5, 2026· Updated: Mar 9, 2026

6.5
CVSS v3.1
EPSS:0.14%probability of exploitation in 30 daysPercentile:33.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-28394 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

openclaw1 product
openclaw
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/openclaw/openclaw/commit/166cf6a3e04c7df42bea70a7ad5ce2b9df46d147
ADVISORYhttps://github.com/openclaw/openclaw/security/advisories/GHSA-p536-vvpp-9mc8
ADVISORYhttps://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-response-parsing-in-web-fetch-tool

All References (3)

→
https://github.com/openclaw/openclaw/commit/166cf6a3e04c7df42bea70a7ad5ce2b9df46d147Patch
→
https://github.com/openclaw/openclaw/security/advisories/GHSA-p536-vvpp-9mc8Vendor Advisory
→
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-response-parsing-in-web-fetch-toolThird Party Advisory

Quick Facts

CVE IDCVE-2026-28394
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-770
CISA KEVNo
EPSS (30d)0.14%
Affected1 vendor
PublishedMar 5, 2026

Related CVEs (CWE-770)

CVE-2026-12818
9.3
CVE-2026-42786
8.7
CVE-2026-35469
8.7
CVE-2026-32145
8.7
CVE-2026-43973
8.7
CVE-2026-48854
8.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-28394 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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