CVE-2026-55446

HIGH EPSS 23.9%
Published Jun 23, 20261w ago · Modified Jun 24, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Jun 23, 2026 1w ago
Last Modified Jun 24, 2026 1w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
23.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 1

VendorProductVersionRange
langflowlangflow* <1.0.19

References 2

  • github.com https://github.com/langflow-ai/langflow/pull/3923
    Issue TrackingPatch
  • github.com https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9
    ExploitPatchVendor Advisory

Remediation

  • github.com https://github.com/langflow-ai/langflow/pull/3923
    Issue TrackingPatch
  • github.com https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9
    ExploitPatchVendor Advisory