CRITICAL 9.9

PYSEC-2026-221

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.

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Affected packages

PyPI / langflow

Introduced in: 0 Fixed in: 1.9.2

Fix pip 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]