CVE-2026-49138: Nanobot ai Nanobot Contains A Server-side Request Vulnerability

MODERATE
Advisory Identifier: GHSA-434r-7c99-hwf3
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CVSS 5.0
CWE-918
Published
Advisory Summary

CVE-2026-49138 is a MODERATE (CVSS 5.0) nanobot contains a server-side request vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Nanobot ai libraries in the PyPI ecosystem. The issue involves nanobot contains a server-side request forgery vulnerability in the web_fetch tool. Remediation is available by upgrading affected packages to version 0.2.1.

CVE-2026-49138 at a Glance

CVE Identifier CVE-2026-49138
GHSA Identifier GHSA-434r-7c99-hwf3
Severity MODERATE
CVSS v3.1 Base Score 5.0
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Nanobot ai
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-49138

To remediate this vulnerability, upgrade all affected Nanobot ai dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

nanobot-ai fixed: 0.2.1 
pip install nanobot-ai>=0.2.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show nanobot-ai

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-49138, inspect your installed packages using pip:

pip show nanobot-ai

Analyze the terminal output to locate any version of Nanobot ai in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.1), your application is affected.

Note: The pip show nanobot-ai command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where 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. In Nanobot ai, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-49138 Affected Nanobot ai Versions

1 component(s)
Fixed Versions:
0.2.1
Product / Package Ecosystem Affected Versions Fixed Version
nanobot-ai
pypi/nanobot-ai
PyPI
< 0.2.1
0.2.1

References

NVD — CVE-2026-49138 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49138
Nanobot ai Source Repository REPOSITORY
https://github.com/HKUDS/nanobot/pull/3928
Security Fix Commit FIX COMMIT
https://github.com/HKUDS/nanobot/commit/545294c62c0947da40eb5b65288aaf02b5fdf632
Nanobot ai Source Repository REPOSITORY
https://github.com/HKUDS/nanobot
Nanobot ai Release RELEASE
https://github.com/HKUDS/nanobot/releases/tag/v0.2.1
www.vulncheck.com/advisories/nanobot-... WEB
https://www.vulncheck.com/advisories/nanobot-ssrf-via-web-fetch-tool-redirect-following

Frequently Asked Questions

What is CVE-2026-49138?
CVE-2026-49138 is a security vulnerability in Nanobot ai involving Nanobot contains a server-side request forgery vulnerability in the web_fetch tool under CWE-918: Server-Side Request Forgery (SSRF).
Which Nanobot ai versions are affected?
Affected versions include releases prior to 0.2.1 across affected packages: nanobot-ai.
What version fixes CVE-2026-49138?
Upgrading to 0.2.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is nanobot-ai affected?
Yes, nanobot-ai is affected in releases prior to 0.2.1. Upgrade your dependency to 0.2.1 or later.
What is the CVSS score of CVE-2026-49138?
CVE-2026-49138 has a CVSS v3.1 base score of 5.0 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
What CWE is associated with CVE-2026-49138?
CVE-2026-49138 is classified under CWE-918: Server-Side Request Forgery (SSRF) (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.).
How can I check PyPI dependencies for CVE-2026-49138?
Run the dependency tree command: 'pip show nanobot-ai'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "id" : "GHSA-434r-7c99-hwf3",
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  "published" : "2026-06-01T21:30:44Z",
  "aliases" : [ "CVE-2026-49138" ],
  "summary" : "Nanobot contains a server-side request forgery vulnerability in the web_fetch tool",
  "details" : "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.",
  "severity" : [ {
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    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"
  }, {
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  "references" : [ {
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    "type" : "WEB",
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  "database_specific" : {
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}