by Kastro
Paper/Archive/CVE-2026-8505

CVE-2026-8505

IBM Langflow OSS — Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution

EPSS 0.9%CVSS 9.8
critical.is priorityof 100
41
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 58.8.588 × 2011.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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).

Affected

ProductAffectedFixed inSource
Langflow OSS1.0.0 – 1.10.0–CNA

Scores by source

ibm (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchibm.com/support/pages/node/7278921