CVE-2026-41949

high

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.

References

https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-preview-endpoint

https://www.zafran.io/resources/difytap-zafran-discovers-how-attackers-can-silently-wiretap-ai-data-across-tenants-on-a-platform-powering-1m-apps

https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682

https://www.securityweek.com/data-exposure-flaws-threaten-dify-ai-platform-powering-over-1-million-apps/

https://www.darkreading.com/application-security/difytap-bugs-wiretap-ai-chat-histories

https://thehackernews.com/2026/06/researchers-detail-difytap-flaws-in.html

https://github.com/langgenius/dify/releases/tag/1.14.2

https://github.com/langgenius/dify/pull/35797

https://github.com/langgenius/dify/commit/432a6412a3fdb30ce48003d699b90cc7d890df20

Details

Source: Mitre, NVD

Published: 2026-05-18

Updated: 2026-06-22

Named Vulnerability: DifyTap

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

CVSS v4

Base Score: 8.2

Vector: 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

Severity: High

EPSS

EPSS: 0.0003