---
id: CVE-2026-111618
title: >-
  CoAI through 4.0.0 Unauthenticated Path Traversal via Archive Download
  Endpoints
summary: >-
  CoAI (Chat Nio) through 4.0.0 contains an unauthenticated path traversal
  vulnerability in the generation and article archive download endpoints via the
  hash query parameter. Attackers can supply ../ sequences in hash to download
  any read…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-22
vendor: coaidev
product: CoAI
affected:
  - CoAI <= 4.0.0
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:38:55.985Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111618'
references:
  - url: >-
      https://hackmd.io/@hieuPenguinnn/coai-chatnio-generation-article-download-path-traversal
  - url: >-
      https://github.com/coaidev/coai/blob/v4.0.0/addition/generation/api.go#L19-L29
  - url: >-
      https://github.com/coaidev/coai/blob/v4.0.0/addition/article/api.go#L25-L35
  - url: >-
      https://www.vulncheck.com/advisories/coai-through-4.0.0-unauthenticated-path-traversal-via-archive-download-endpoints
    label: >-
      VulnCheck Advisory: CoAI through 4.0.0 Unauthenticated Path Traversal via
      Archive Download Endpoints
tags:
  - cve.org
ingestedAt: '2026-10-16T18:43:08.692Z'
---

## Overview

CoAI (Chat Nio) through 4.0.0 contains an unauthenticated path traversal vulnerability in the generation and article archive download endpoints via the hash query parameter. Attackers can supply ../ sequences in hash to download any readable .tar.gz or .zip file, including other users' generated archives.

## Affected

- `CoAI <= 4.0.0`

## Remediation

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