CVE-2026-49138
Server-Side Request Forgery in Nanobot Web Fetch Tool
Publication date: 2026-06-01
Last updated on: 2026-06-01
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-918 | The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in Nanobot versions prior to 0.2.1 within the web_fetch tool. It is a server-side request forgery (SSRF) issue that allows remote attackers to make the server send requests to internal or private network hosts. This happens because the tool follows HTTP redirects automatically using the httpx library, which can be manipulated via a 3xx Location header to redirect to loopback or private addresses. The initial URL validation is bypassed due to this redirect behavior, causing the runtime to send outbound requests before the final URL validation occurs.
How can this vulnerability impact me? :
This vulnerability can allow an attacker to access internal or private network resources that are normally not accessible from outside the network. By exploiting the SSRF, attackers can potentially reach sensitive internal services, which may lead to information disclosure or further attacks within the internal network.