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VULNERABILITIES

CVE-2026-55446 Details

Description

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.0.19, an attacker can send a /api/v1/files/upload/ request without any authentication token/cookies and abuse a very long multipart form boundary to make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9 CISA-ADPExploitPatchVendor Advisory
https://github.com/langflow-ai/langflow/pull/3923 [email protected]Issue TrackingPatch
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9 [email protected]ExploitPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]

Affected Products

ProductVersions
langflow langflow
< 1.0.19

CPE

  • cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-55446
NVD Published Date:
Jun 23, 2026
NVD Last Modified:
Jun 24, 2026
Source:
[email protected]