CRITICAL9.9

PYSEC-2026-221

Quick fix

PYSEC-2026-221 — langflow: upgrade to the fixed version with the command below.

pip install --upgrade 'langflow>=1.9.2'

Details

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.2.

Are you affected?

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Affected packages

PyPI/langflow

Introduced in: 0Fixed in: 1.9.2

Fixpip install --upgrade 'langflow>=1.9.2'

References

https://github.com/langflow-ai/langflow/pull/12832[FIX]
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2[EVIDENCE]