CVE-2026-41949Public exploitNetwork attack vector

Cross-tenant document disclosure via unscoped file lookup

Published May 18, 2026 · Updated May 18, 2026

Authorization bypass in LangGenius Dify before 1.14.2 allows remote authenticated users to read cross-tenant document previews. FilePreviewApi passes a user-supplied file UUID to FileService, which queries UploadFile by id without restricting tenant_id and returns up to 3,000 characters. Console authentication is required on self-hosted instances; free cloud registration makes that gate trivial.

CVSS severity8.2
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in LangGenius Dify before 1.14.2 allows remote authenticated users to read cross-tenant document previews. FilePreviewApi passes a user-supplied file UUID to FileService, which queries UploadFile by id without restricting tenant_id and returns up to 3,000 characters. Console authentication is required on self-hosted instances; free cloud registration makes that gate trivial.

The record

CVE
CVE-2026-41949
Published
May 18, 2026
Updated
May 18, 2026
Vendor
LangGenius
Product
Dify
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 18, 2026CVE publishedPublication date reported by the CVE source.
  2. May 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=1.14.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LangGenius · Difyversion=0 <=1.14.1

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
8.2VulnCheckCVSS:4.0/AV:N/AC:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
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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