CVE-2026-85671 QAnything 2.0.0 Unauthenticated Cross-User File Disclosure
Unauthenticated attackers can bypass authentication to access and disclose cross-tenant knowledge base files and documents in QAnything.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85671?
CVE-2026-85671 is a high-severity authentication bypass vulnerability in netease-youdao QAnything, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-85671?
How do I fix CVE-2026-85671?
No fix has been published for CVE-2026-85671 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-85671 being exploited?
There is no known exploitation of CVE-2026-85671 in the wild and no public exploit code.
Sources
Also known as GHSA-mq4x-r3rg-g5rq.