CVE-2026-41949

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

8.2CVSS: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 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-639

Published

2026-05-18

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• dify:dify

References

• https://github.com/langgenius/dify/commit/432a6412a3fdb30ce48003d699b90cc7d890df20
• https://github.com/langgenius/dify/pull/35797
• https://github.com/langgenius/dify/releases/tag/1.14.2
• https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682
• https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-preview-endpoint

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