SB2026080727 - Remote code execution in Langflow

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Main Vulnerability Database SB2026080727

SB2026080727 - Remote code execution in Langflow

Published: August 7, 2026

Security Bulletin ID SB2026080727
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Critical 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Code Injection (CVE-ID: CVE-2026-9198) Exploited

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: 9.3 [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]


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to improper control of code generation in the /api/v1/validate/code endpoint when handling code submitted after obtaining a bearer token from /api/v1/auto_login. A remote attacker can obtain a superuser bearer token and submit malicious Python code to execute arbitrary code.

This affects default-configured instances where the auto-login feature is enabled and the validation endpoint is network-accessible.


Remediation

Install update from vendor's website.

References