CVE-2026-41949 — The File Preview Endpoint That Vulnerability
CVE-2026-41949 — Dify version 1.14.1 and prior contain 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
What This Means For You
- If your environment is affected by CWE-639, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-41949 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Dify File Preview Authorization Bypass Attempt — CVE-2026-41949
title: Dify File Preview Authorization Bypass Attempt — CVE-2026-41949
id: scw-2026-05-18-ai-1
status: experimental
level: high
description: |
Detects attempts to access the Dify file preview endpoint (/console/api/files/{file_id}/preview) which is vulnerable to authorization bypass in versions prior to 1.14.1 (CVE-2026-41949). This rule specifically looks for GET requests to this path, indicating an attempt to exploit the vulnerability by accessing file content using only a file UUID.
author: SCW Feed Engine (AI-generated)
date: 2026-05-18
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-41949/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/console/api/files/'
cs-uri|contains:
- '/preview'
cs-method:
- 'GET'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-41949 | vulnerability | CVE-2026-41949 |
| CWE-639 | weakness | CWE-639 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 18, 2026 at 18:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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