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CVE Vulnerability Details :
CVE-2026-42867
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-23 Jun, 2026 | 16:29
Updated At-23 Jun, 2026 | 17:02
Rejected At-
▼CVE Numbering Authority (CNA)
Langflow: Path Traversal in Knowledge Bases API via Creation Endpoint

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow 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. This vulnerability is fixed in 1.9.0.

Affected Products
Vendor
langflow-ai
Product
langflow
Versions
Affected
  • < 1.9.0
Problem Types
TypeCWE IDDescription
CWECWE-22CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Type: CWE
CWE ID: CWE-22
Description: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq
x_refsource_CONFIRM
https://github.com/langflow-ai/langflow/pull/12337
x_refsource_MISC
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/langflow-ai/langflow/pull/12337
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq
exploit
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq
Resource:
exploit
Details not found