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CVE-2026-6598: Langflow: Cleartext Storage of Authentication Settings in Project Creation Endpoint

April 20, 2026 (updated April 24, 2026)

A security vulnerability has been detected in langflow-ai langflow up to 1.8.3. The affected element is the function create_project/encrypt_auth_settings of the file src/backend/base/Langflow/api/v1/projects.py of the component Project Creation Endpoint. Such manipulation of the argument auth_settings leads to cleartext storage in a file or on disk. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

References

  • gist.github.com/chenhouser2025/77adb3486c06c635ae4b09a3eaf90213
  • github.com/advisories/GHSA-9jpj-cph8-w449
  • github.com/langflow-ai/langflow
  • github.com/langflow-ai/langflow/commit/45325f6376309a91f5017fa033a96c09c7e295e3
  • nvd.nist.gov/vuln/detail/CVE-2026-6598
  • vuldb.com/submit/791921
  • vuldb.com/vuln/358233
  • vuldb.com/vuln/358233/cti

Code Behaviors & Features

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Affected versions

All versions before 1.9.1

Fixed versions

  • 1.9.1

Solution

Upgrade to version 1.9.1 or above.

Impact 4.3 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-312: Cleartext Storage of Sensitive Information
  • CWE-313: Cleartext Storage in a File or on Disk

Source file

pypi/langflow/CVE-2026-6598.yml

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