CVE-2026-85671Public exploitNetwork attack vector

Unauthenticated cross-tenant file disclosure via unguarded handlers

Published Sep 4, 2026 · Updated Sep 4, 2026

Missing authentication in NetEase Youdao QAnything 2.0.0 and earlier allows remote attackers to read uploaded files and document chunks. The get_file_base64 and get_doc handlers accept server-assigned identifiers without authentication or ownership checks, while companion endpoints disclose identifiers. No credentials or user interaction are required, and successful requests expose other tenants’ original files or parsed knowledge-base text without enabling modification.

CVSS severity8.7
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in NetEase Youdao QAnything 2.0.0 and earlier allows remote attackers to read uploaded files and document chunks. The get_file_base64 and get_doc handlers accept server-assigned identifiers without authentication or ownership checks, while companion endpoints disclose identifiers. No credentials or user interaction are required, and successful requests expose other tenants’ original files or parsed knowledge-base text without enabling modification.

The record

CVE
CVE-2026-85671
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
NetEase Youdao
Product
QAnything
Classifications
CWE-306, T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NetEase Youdao · QAnythingversion=0 <=2.0.0

Published CVSS scores

7.5VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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