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NVD Vulnerability Details :
CVE-2026-42867
Undergoing Analysis
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-23 Jun, 2026 | 17:16
Updated At-23 Jun, 2026 | 18:17

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
N/A
Type: Secondary
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
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-22Secondarysecurity-advisories@github.com
CWE ID: CWE-22
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/langflow-ai/langflow/pull/12337security-advisories@github.com
N/A
https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxqsecurity-advisories@github.com
N/A
https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq134c704f-9b21-4f2e-91b3-4a467353bcc0
N/A
Hyperlink: https://github.com/langflow-ai/langflow/pull/12337
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource: N/A
Change History
0Changes found
Details not found