---
id: CVE-2026-90809
title: A vulnerability was identified in HKUDS nanobot up to 0.2.1
summary: >-
  A vulnerability was identified in HKUDS nanobot up to 0.2.1. The affected
  element is the function ExecTool._guard_command/ExecTool._spawn of the file
  nanobot/agent/tools/shell.py of the component ExecTool. Such manipulation
  leads to argu…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-74
  - CWE-88
vendor: HKUDS
product: nanobot
affected:
  - nanobot 0.2.0
  - nanobot 0.2.1
published: '2026-09-14'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T14:17:38.560'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90809'
references:
  - url: 'https://github.com/HKUDS/nanobot/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750
    label: cna@vuldb.com
  - url: 'https://github.com/HKUDS/nanobot/issues/5306'
    label: cna@vuldb.com
  - url: 'https://github.com/HKUDS/nanobot/pull/5345'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-90809'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/922850'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403311'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403311/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-15T13:32:44.976748Z'
epss: 0.00326
epssPercentile: 0.25912
ingestedAt: '2026-09-14T19:13:23.477Z'
---

## Overview

A vulnerability was identified in HKUDS nanobot up to 0.2.1. The affected element is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component ExecTool. Such manipulation leads to argument injection. It is possible to launch the attack remotely. The name of the patch is af582246f141311d574551b7571a517bcc3df750. It is best practice to apply a patch to resolve this issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.