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CVE-2026-49138— Nanobot < 0.2.1 SSRF via web_fetch Tool Redirect Following

Quick assessment

Affected
HKUDS nanobot
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

nanobot是Data Intelligence Lab@HKU开源的一个轻量个人AI助手。 Nanobot 0.2.1之前版本存在代码问题漏洞，该漏洞源于web_fetch工具中服务器端请求伪造问题，可能导致远程攻击者通过提供重定向到回环或私有地址的URL，利用httpx库的自动HTTP重定向跟随行为绕过初始URL验证，访问内部或私有网络主机。

CVSS 5.0 · Medium EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
HKUDS nanobot < 0.2.1 affected
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I. Basic Information for CVE-2026-49138

Vulnerability Information
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Vulnerability Title
Nanobot < 0.2.1 SSRF via web_fetch Tool Redirect Following
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
nanobot 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nanobot是Data Intelligence Lab@HKU开源的一个轻量个人AI助手。 Nanobot 0.2.1之前版本存在代码问题漏洞，该漏洞源于web_fetch工具中服务器端请求伪造问题，可能导致远程攻击者通过提供重定向到回环或私有地址的URL，利用httpx库的自动HTTP重定向跟随行为绕过初始URL验证，访问内部或私有网络主机。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HKUDS nanobot 0 ~ 0.2.1 -

II. Public POCs for CVE-2026-49138

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III. Intelligence Information for CVE-2026-49138

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Patches & Fixes for CVE-2026-49138 (2)

Proof of Concept for CVE-2026-49138 (1)

Other References for CVE-2026-49138 (1)

Same Patch Batch · HKUDS · 2026-06-01 · 3 CVEs total

CVE-2026-49139 7.0 HIGH Nanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning
CVE-2026-49140 4.3 MEDIUM Nanobot < 0.2.1 Denial of Service via Matrix Media Download Handler

IV. Related Vulnerabilities

Same product: nanobot
Same vendor: HKUDS
Same weakness: CWE-918