Input validation error in Langflow - CVE-2026-7803

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Main Vulnerability Database Vulnerabilities #VU136034

Input validation error in Langflow - CVE-2026-7803

Published: July 1, 2026


Vulnerability identifier: #VU136034
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-7803
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Langflow
Affected software:
Langflow

Detailed vulnerability description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper validation of flow nodes with missing or empty component type fields. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.


How to mitigate CVE-2026-7803

Install updates from vendor's website.

Sources