---
id: CVE-2026-90808
title: A vulnerability was determined in HKUDS nanobot up to 0.2.1
summary: >-
  A vulnerability was determined in HKUDS nanobot up to 0.2.1. Impacted is the
  function ExecTool._guard_command/ExecTool._spawn of the file
  nanobot/agent/tools/shell.py of the component ExecTool. This manipulation
  causes incomplete blackli…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-183
  - CWE-184
vendor: HKUDS
product: nanobot
affected:
  - nanobot 0.2.0
  - nanobot 0.2.1
published: '2026-09-14'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:56:48.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90808'
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/5305'
    label: cna@vuldb.com
  - url: 'https://github.com/HKUDS/nanobot/pull/5345'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-90808'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/922849'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403310'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403310/cti'
    label: cna@vuldb.com
  - url: 'https://github.com/HKUDS/nanobot/issues/5305'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T19:12:46.427617Z'
ingestedAt: '2026-09-14T19:13:23.484Z'
epss: 0.00287
epssPercentile: 0.21429
---

## Overview

A vulnerability was determined in HKUDS nanobot up to 0.2.1. Impacted is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component ExecTool. This manipulation causes incomplete blacklist. It is possible to initiate the attack remotely. Patch name: af582246f141311d574551b7571a517bcc3df750. Applying a patch is the recommended action to fix this issue.

## Remediation

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