CVE-2026-85671
Received Received - Intake

Authentication Bypass in QAnything File Access

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: VulnCheck

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.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-85671
EUVD
EUVD-2026-71127

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
netease_youdao qanything 2.0.0
netease_youdao qanything to 2.0.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

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Executive Summary

QAnything 2.0.0 has an authentication bypass flaw in two endpoints (/api/local_doc_qa/get_file_base64 and /api/local_doc_qa/get_doc) that lets unauthenticated attackers access any uploaded files or documents without permission.

Detection Guidance

Check for unauthorized access to the endpoints /api/local_doc_qa/get_file_base64 and /api/local_doc_qa/get_doc by monitoring network traffic or logs for requests to these paths without valid authentication tokens.

Impact Analysis

Attackers could steal sensitive files or document contents by guessing file identifiers. This could expose confidential data, intellectual property, or personal information stored in the system.

Compliance Impact

This vulnerability could lead to unauthorized access to protected health information or personal data, violating GDPR and HIPAA compliance requirements for data confidentiality and access controls.

Mitigation Strategies

Immediately restrict access to the vulnerable endpoints by implementing authentication checks or disabling them if not required. Update QAnything to the latest patched version if available.

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