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CVE

CWE

Training

CVE-2026-49138

Published: Jun 1, 2026

Modified: Jun 2, 2026

PUBLISHED

CVSS v3.1

5.0

MEDIUM

Description

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.

Vendor	Product	Versions
HKUDS	nanobot	affected `0 - < 0.2.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

References

https://github.com/HKUDS/nanobot/releases/tag/v0.2.1

release-notes

https://github.com/HKUDS/nanobot/pull/3928

issue-tracking

https://github.com/HKUDS/nanobot/commit/545294c62c0947da40eb5b65288aaf02b5fdf632

patch

https://www.vulncheck.com/advisories/nanobot-ssrf-via-web-fetch-tool-redirect-following

third-party-advisory

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