CVE-2026-8505

critical

Description

IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).

References

https://www.ibm.com/support/pages/node/7278921

https://github.com/langflow-ai/langflow/security/advisories/GHSA-cf6m-vc3m-7cgm

https://github.com/langflow-ai/langflow/releases/tag/v1.9.1

https://github.com/langflow-ai/langflow/pull/12845

https://github.com/langflow-ai/langflow/commit/cb6f7508dda83ead9c3e4417e96e4b5bd9a260c3

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-45272

Details

Source: Mitre, NVD

Published: 2026-07-17

Updated: 2026-07-23

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.00719