Vulnerability · Published Sep 4, 2026 · Assigned by VulnCheck

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

High 7.5

In plain English

A high-severity missing authentication in QAnything from netease-youdao. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 49.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
netease-youdao	QAnything	0 – through 2.0.0

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GitHub Issue #670 issue-tracking
https://github.com/netease-youdao/QAnything product
https://github.com/netease-youdao/QAnything/blob/v2.0.0/qanything_kernel/qanything_server/handler.py technical-description
VulnCheck Advisory: QAnything 2.0.0 Unauthenticated Cross-User File Disclosure third-party-advisory