---
id: CVE-2026-85671
title: >-
  QAnything 2.0.0 contains an authentication bypass vulnerability in the
  /api/local_doc_qa/get_file_base64 and /api/local_doc_qa/get_doc endpoints that
  allows unauthenticated attackers to access any uploaded file or document
summary: >-
  QAnything 2.0.0 contains an authentication bypass vulnerability in the
  /api/local_doc_qa/get_file_base64 and /api/local_doc_qa/get_doc endpoints that
  allows unauthenticated attackers to access any uploaded file or document.
  Attackers can…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-306
vendor: netease-youdao
product: QAnything
affected:
  - QAnything <= 2.0.0
published: '2026-09-04'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:46.520'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85671'
references:
  - url: 'https://github.com/netease-youdao/QAnything'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/netease-youdao/QAnything/blob/v2.0.0/qanything_kernel/qanything_server/handler.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/netease-youdao/QAnything/issues/670'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/qanything-2.0.0-unauthenticated-cross-user-file-disclosure
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00364
epssPercentile: 0.30293
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-14T19:20:14.474561Z'
ingestedAt: '2026-09-14T20:14:21.165Z'
---

## Overview

QAnything 2.0.0 contains an authentication bypass vulnerability in the /api/local_doc_qa/get_file_base64 and /api/local_doc_qa/get_doc endpoints that allows unauthenticated attackers to access any uploaded file or document. Attackers can enumerate file identifiers through unauthenticated endpoints and retrieve base64-encoded files or parsed document chunks without ownership verification to disclose cross-tenant knowledge base content.

## Remediation

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