CVE-2026-51888: n/a
langflow-ai langflow version 1.8.4 contains an absolute path traversal vulnerability in the knowledge base creation HTTP POST endpoint. This flaw allows an attacker to write or overwrite files outside the intended workspace by supplying absolute paths in the request. The vulnerability arises from insufficient boundary enforcement on file paths in the backend API handler.
AI Analysis
Technical Summary
CVE-2026-51888 describes an absolute path traversal vulnerability in langflow-ai langflow up to version 1.8.4. The vulnerable component is the knowledge_bases-create_knowledge_base endpoint implemented in src/backend/base/langflow/api/v1/knowledge_bases.py. This endpoint accepts attacker-controlled file paths without proper validation, enabling arbitrary file write operations outside the intended storage boundary. The attack vector is a public-facing HTTP or browser-backed service path that processes file creation requests.
Potential Impact
An attacker exploiting this vulnerability can write or overwrite arbitrary files on the host system outside the designated workspace. This can lead to unauthorized modification of files, potential code execution, or disruption of application functionality depending on the files overwritten. The vulnerability compromises the integrity and security of the host environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable endpoint and validate or sanitize input paths to prevent absolute path traversal. Monitor for unusual file modifications related to the knowledge base creation functionality.
CVE-2026-51888: n/a
Description
langflow-ai langflow version 1.8.4 contains an absolute path traversal vulnerability in the knowledge base creation HTTP POST endpoint. This flaw allows an attacker to write or overwrite files outside the intended workspace by supplying absolute paths in the request. The vulnerability arises from insufficient boundary enforcement on file paths in the backend API handler.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-51888 describes an absolute path traversal vulnerability in langflow-ai langflow up to version 1.8.4. The vulnerable component is the knowledge_bases-create_knowledge_base endpoint implemented in src/backend/base/langflow/api/v1/knowledge_bases.py. This endpoint accepts attacker-controlled file paths without proper validation, enabling arbitrary file write operations outside the intended storage boundary. The attack vector is a public-facing HTTP or browser-backed service path that processes file creation requests.
Potential Impact
An attacker exploiting this vulnerability can write or overwrite arbitrary files on the host system outside the designated workspace. This can lead to unauthorized modification of files, potential code execution, or disruption of application functionality depending on the files overwritten. The vulnerability compromises the integrity and security of the host environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable endpoint and validate or sanitize input paths to prevent absolute path traversal. Monitor for unusual file modifications related to the knowledge base creation functionality.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6abfc5e5a43b0b3b89c8de41
Added to database: 10/02/2026, 14:55:33 UTC
Last enriched: 10/02/2026, 14:57:57 UTC
Last updated: 10/03/2026, 03:04:23 UTC
Views: 10
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