CVE-2026-49138
MEDIUMNanobot < 0.2.1 - Server-Side Request Forgery via Web Fetch Tool Redirect Following
Title source: llmDescription
Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private address via a 3xx Location header. Attackers can exploit the automatic HTTP redirect following behavior in the httpx library to bypass initial URL validation and cause the runtime to send outbound requests to internal hosts before final resolved URL validation is applied.
References (4)
Core 4
Core References
Release Notes release-notes
https://github.com/HKUDS/nanobot/releases/tag/v0.2.1
Issue Tracking issue-tracking
https://github.com/HKUDS/nanobot/pull/3928
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/nanobot-ssrf-via-web-fetch-tool-redirect-following
Scores
CVSS v3
5.0
EPSS
0.0004
EPSS Percentile
13.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (1)
HKUDS/nanobot
< 0.2.1
Published
Jun 01, 2026
Tracked Since
Jun 02, 2026