CVE-2026-85671: Missing Authentication for Critical Function in netease-youdao QAnything
Description
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.
CVSS v4.0
Score 8.7high
Affected software
netease-youdao
QAnything
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85671 is an authentication bypass vulnerability affecting netease-youdao's QAnything product up to version 2.0.0. The flaw exists in the /api/local_doc_qa/get_file_base64 and /api/local_doc_qa/get_doc endpoints, which do not require authentication. This allows unauthenticated attackers to enumerate file identifiers and retrieve sensitive files or document data encoded in base64, bypassing any ownership checks and exposing data across tenants.
Potential Impact
The vulnerability allows unauthenticated attackers to access and disclose sensitive files and document content uploaded by other users, violating confidentiality and potentially exposing sensitive knowledge base information across tenants. This can lead to significant data leakage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the affected API endpoints and monitor for unauthorized access attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-04T13:32:36.997Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9adb45acd9273b49bef599
Added to database: 09/04/2026, 14:52:53 UTC
Last enriched: 09/14/2026, 22:40:46 UTC
Last updated: 10/17/2026, 18:48:23 UTC
Views: 46
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