CVE-2026-7869

MEDIUM 5.4

Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	ibm
Product	langflow oss
Published	Aug 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

IBM / Langflow OSS

1.0.0 ≤ 1.10.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

ibm.com: https://www.ibm.com/support/pages/node/7282647

Credits

Sergio Cabrera (ddlxstudio) https://github.com/nekros1xx