CVE-2026-8446CWE-306

CVE-2026-8446

High · published August 5, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
41.1
In the wild
Unconfirmed
What it is

IBM Langflow OSS 1.0.0 through 1.10.3 contain an authentication bypass vulnerability in the Model Context Protocol (MCP) composer endpoint when mcp_composer_enabled=true (default) and projects are configured with auth_type=oauth .

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00489 · 41.1th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-08-05T21:16Z
Affected products (1)
ProductVersionsFixed in
langflow/langflow≥ 1.0.0, < 1.11.01.11.0
References (1)
https://www.ibm.com/support/pages/node/7282147 · [email protected]
EPSS history
Timeline
  • 05 AUG 16:27Z
    Langflow is affected by security vulnerabilities in Model Context Protocol features
    cvelistv5