CVE-2026-85671: QAnything 2.0.0 Unauthenticated Cross-User File Disclosure

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-04 · updated 2026-09-23
Weakness: CWE-306

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.

Affected products

netease-youdao/qanything: through 2.0.0

References

https://github.com/netease-youdao/QAnything
https://github.com/netease-youdao/QAnything/blob/v2.0.0/qanything_kernel/qanything_server/handler.py
https://github.com/netease-youdao/QAnything/issues/670
https://www.vulncheck.com/advisories/qanything-2.0.0-unauthenticated-cross-user-file-disclosure

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