CVE-2026-28394
Denial of Service in OpenClaw Web_Fetch via Malicious HTML
Publication date: 2026-03-05
Last updated on: 2026-03-09
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| openclaw | openclaw | to 2026.2.15 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-770 | The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in OpenClaw versions prior to 2026.2.15 within the web_fetch tool. It is a denial of service (DoS) vulnerability that allows attackers to crash the Gateway process by exhausting its memory. This happens when the tool parses oversized or deeply nested HTML responses.
Remote attackers can exploit this by tricking users into fetching malicious URLs containing pathological HTML structures that consume excessive server memory, leading to service unavailability.
How can this vulnerability impact me? :
The primary impact of this vulnerability is a denial of service condition. Attackers can cause the Gateway process to crash by exhausting its memory resources, resulting in the unavailability of the service.
This can disrupt normal operations, potentially causing downtime and loss of access to services relying on the OpenClaw Gateway.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know