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

> Authenticated users can read sensitive content from any uploaded document across all tenants by accessing the file preview endpoint with a valid UUID.

- **Severity:** High 8.2 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 May 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-jv3f-qwf9-wvq9

## What is CVE-2026-41949?

CVE-2026-41949 is a high-severity missing authorization vulnerability in langgenius dify, published on 18 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-41949?

It affects 1 product.


Products: Dify Dify.

## How do I fix CVE-2026-41949?

No fix has been published for CVE-2026-41949 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-41949 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41949 exists.

## Other vulnerabilities in langgenius dify

- [CVE-2026-41947](https://insights.sbomify.com/CVE-2026-41947/): Dify < 1.14.2 Authorization Bypass via Trace Configuration Endpoints (critical 9.3)
- [CVE-2026-41948](https://insights.sbomify.com/CVE-2026-41948/): Dify v1.14.1 Path Traversal via Plugin Daemon Internal API Access (critical 9.3)
- [CVE-2025-0185](https://insights.sbomify.com/CVE-2025-0185/): Pandas Query Injection in langgenius/dify (high 8.8)
- [CVE-2026-61461](https://insights.sbomify.com/CVE-2026-61461/): Dify < 1.16.0-rc1 SQL Injection via MyScale Vector Store search_by_full_text (high 8.7)
- [CVE-2025-67732](https://insights.sbomify.com/CVE-2025-67732/): Dify Vulnerable to Plaintext API Key Exposure via Model Provider Configuration Endpoint (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-41949 and fix it if it is affected.

What it is: CVE-2026-41949 is a high-severity missing authorization vulnerability in langgenius dify, published on 18 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41949 exists.

Affected product: langgenius dify. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-41949/ (Markdown: https://insights.sbomify.com/CVE-2026-41949/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-41949
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41949
- OSV: https://osv.dev/vulnerability/CVE-2026-41949

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-41949/
Summaries are generated and may contain mistakes; the official description above is the record.