CVE-2026-51888

langflow-ai langflow v1.8.4 is affected by: Directory Traversal. The impact is: Arbitrary file write outside the intended workspace or storage boundary.. The component is: src/backend/base/langflow/api/v1/knowledge_bases.py:knowledge_bases-create_knowledge_base-a-live-http-post-to-create-knowledge-base. The attack vector is: Attack surface: HTTP or browser-backed service path. A public-facing upload or HTTP route handler forwards an attacker-controlled path or filename into host file creation without any visible boundary enforcement. ¶¶ A weakness has been identified in langflow-ai langflow up to 1.8.4. langflow contains an absolute path traversal vulnerability in knowledge_bases-create_knowledge_base-a-live-http-post-to-create-knowledge-base (src/backend/base/langflow/api/v1/knowledge_bases.py:51). An attacker can write or overwrite files outside the intended working directory by providing absolute paths in the knowledge base creation endpoint.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://gist.github.com/Ro1ME/c85f513d1fd702c686cffe061cbf8ef5
https://gist.github.com/Ro1ME/c85f513d1fd702c686cffe061cbf8ef5

Configurations

No configuration.

History

06 Oct 2026, 15:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://gist.github.com/Ro1ME/c85f513d1fd702c686cffe061cbf8ef5 -~~	() https://gist.github.com/Ro1ME/c85f513d1fd702c686cffe061cbf8ef5 -
CWE		CWE-22

01 Oct 2026, 22:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-01 22:17

Updated : 2026-10-06 15:17

NVD link : CVE-2026-51888

Mitre link : CVE-2026-51888

CVE.ORG link : CVE-2026-51888

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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