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Vulnerability record · CVE-2026-41950 · published 5 May 2026

CVE-2026-41950: Langgenius dify insecure direct object reference vulnerability

LLanggenius · Dify

Dify before version 1.14.0 contains an authorization bypass vulnerability that allows authenticated users to read the full contents of files uploaded by other users within the same tenant by supplying an arbitrary file UUID in the files array of a chat-messages request. Attackers can exploit insufficient permission verification in the chat-messages endpoints to access files without ownership validation, bypassing workspace separation and signed URL protections to retrieve sensitive file contents through workflow processing.

6.0 CVSS 4.0 Medium EPSS 0.47% · top 61.5% CWE-639 · Insecure direct object reference
6.0CVSS 4.0 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
24 Jul 2026Last modified by NVD

Description

Dify before version 1.14.0 contains an authorization bypass vulnerability that allows authenticated users to read the full contents of files uploaded by other users within the same tenant by supplying an arbitrary file UUID in the files array of a chat-messages request. Attackers can exploit insufficient permission verification in the chat-messages endpoints to access files without ownership validation, bypassing workspace separation and signed URL protections to retrieve sensitive file contents through workflow processing.

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/langgenius/dify/releases/tag/1.14.0 Release Notes
https://huntr.com/bounties/181136ec-d957-4b75-8ea7-6fa7b8abd01d ExploitThird Party Advisory
https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-uuid Third Party Advisory
https://www.zafran.io/resources/difytap-zafran-discovers-how-attackers-can-silently-wiretap-ai-data-across-tenants-on-a-
https://huntr.com/bounties/181136ec-d957-4b75-8ea7-6fa7b8abd01d ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-41950), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.