Path Traversal in IBM Langflow Oss
CVE-2026-7869
IBM Langflow OSS 1.0.0 through 1.10.3 is vulnerable to Path Traversal in the Knowledge Bases API (`POST /api/v1/knowledge_bases`). This occurs because user-supplied knowledge base names are used directly to create file paths without proper sanitization or containment checks. An authenticated attacker can exploit this flaw to create directories and write files anywhere on the server's filesystem.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.002 (12.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Ibm Langflow Oss — versions 1.0.0
- Langflow
Weakness classification (CWE)
References
- psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-7869?
- CVE-2026-7869 is a medium-severity vulnerability in IBM Langflow Oss, classified under Path Traversal. CVSS score: 5.4/10. Published 2026-08-05.
- How severe is CVE-2026-7869?
- Medium severity. CVSS v3 base score is 5.4 out of 10.