Medium 5.9Published May 18, 2026

CVE-2026-41949Dify < 1.14.2 Authorization Bypass via File Preview Endpoint

Updated under an hour ago (Oct 28, 2026, 4:40 AM ET)

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Every CVE for langgenius dify

Exploited in the last 30 days

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: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langgenius dify langgenius:dify (from the name)	before 1.14.2	CNA record
dify dify dify:dify	through 1.14.1	NVD

References

References

https://www.zafran.io/resources/difytap-zafran-discovers-how-attackers-can-silently-wiretap-ai-data-across-tenants-on-a-platform-powering-1m-apps	technical-description, exploit
https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682	technical-description, exploit, third-party-advisory
https://github.com/langgenius/dify/releases/tag/1.14.2	release-notes
https://github.com/langgenius/dify/pull/35797	issue-tracking, mitigation, patch
https://github.com/langgenius/dify/commit/432a6412a3fdb30ce48003d699b90cc7d890df20	patch
https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-preview-endpoint	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.