GHSA-7GRX-3XCX-2XV5
Vulnerability from github – Published: 2026-03-20 20:47 – Updated: 2026-06-06 00:56Summary
The /api/v1/files/images/{flow_id}/{file_name} endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flow_id and file_name returns the image with HTTP 200.
Details
src/backend/base/langflow/api/v1/files.py:138-164 — download_image takes flow_id: UUID as a bare path parameter with no Depends(get_flow) or CurrentActiveUser. All other file routes (download_file, upload_file, list_files, delete_file) use Depends(get_flow) which enforces both authentication and ownership. There is no global auth middleware on /api/v1; protection is per-endpoint only.
PoC
curl -v "http://localhost:7860/api/v1/files/images/<flow_uuid>/<filename.png>"
# Returns HTTP 200 with image bytes, no auth header required
Impact
Unauthenticated cross-tenant data leak. In a multi-tenant deployment, any attacker who can discover or guess a flow_id (UUIDs can be leaked through other API responses) can download any user's uploaded images without credentials.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "langflow"
},
"ranges": [
{
"events": [
{
"introduced": "1.0.0"
},
{
"fixed": "1.9.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-33484"
],
"database_specific": {
"cwe_ids": [
"CWE-284",
"CWE-639",
"CWE-862"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-20T20:47:10Z",
"nvd_published_at": "2026-03-24T14:16:30Z",
"severity": "HIGH"
},
"details": "### Summary\nThe `/api/v1/files/images/{flow_id}/{file_name}` endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flow_id and file_name returns the image with HTTP 200.\n\n### Details\n`src/backend/base/langflow/api/v1/files.py:138-164` \u2014 `download_image` takes `flow_id`: UUID as a bare path parameter with no Depends(get_flow) or `CurrentActiveUser`. All other file routes (`download_file`, `upload_file`, `list_files`, `delete_file`) use `Depends(get_flow)` which enforces both authentication and ownership. There is no global auth middleware on /api/v1; protection is per-endpoint only.\n\n### PoC\n```\ncurl -v \"http://localhost:7860/api/v1/files/images/\u003cflow_uuid\u003e/\u003cfilename.png\u003e\"\n# Returns HTTP 200 with image bytes, no auth header required\n```\n\n### Impact\nUnauthenticated cross-tenant data leak. In a multi-tenant deployment, any attacker who can discover or guess a `flow_id` (UUIDs can be leaked through other API responses) can download any user\u0027s uploaded images without credentials.",
"id": "GHSA-7grx-3xcx-2xv5",
"modified": "2026-06-06T00:56:13Z",
"published": "2026-03-20T20:47:10Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7grx-3xcx-2xv5"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33484"
},
{
"type": "PACKAGE",
"url": "https://github.com/langflow-ai/langflow"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-80.yaml"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "langflow has Unauthenticated IDOR on Image Downloads"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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