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Vulnerability record · CVE-2026-41949 · published 18 May 2026

CVE-2026-41949: Dify insecure direct object reference vulnerability

Dify · Dify

Dify before version 1.14.2 contains an authorization bypass vulnerability in the file preview endpoint that allows any authenticated user to read up to 3,000 characters of any uploaded document across all tenants and workspaces using only the file's UUID. Attackers can access the /console/api/files/{file_id}/preview endpoint with an intercepted file UUID to extract sensitive content from documents without ownership or workspace permission verification. NOTE: Dify Cloud allows unauthenticated free self-registration, making account creation trivially accessible to any attacker.

8.2 CVSS 4.0 High EPSS 0.57% · top 55.2% CWE-639 · Insecure direct object reference
8.2CVSS 4.0 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 1 tagged exploit
22 Jun 2026Last modified by NVD

Description

Dify before version 1.14.2 contains an authorization bypass vulnerability in the file preview endpoint that allows any authenticated user to read up to 3,000 characters of any uploaded document across all tenants and workspaces using only the file's UUID. Attackers can access the /console/api/files/{file_id}/preview endpoint with an intercepted file UUID to extract sensitive content from documents without ownership or workspace permission verification. NOTE: Dify Cloud allows unauthenticated free self-registration, making account creation trivially accessible to any attacker.

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/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/commit/432a6412a3fdb30ce48003d699b90cc7d890df20
https://github.com/langgenius/dify/pull/35797 Issue TrackingMitigationPatch
https://github.com/langgenius/dify/releases/tag/1.14.2
https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682 ExploitThird Party Advisory
https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-preview-endpoint Third Party Advisory
https://www.zafran.io/resources/difytap-zafran-discovers-how-attackers-can-silently-wiretap-ai-data-across-tenants-on-a-

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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-2026-41949), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.