CVE-2026-9103

Unauthenticated Superuser Token Issuance via Auto-Login Endpoint

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to gain unauthorized access due to improper authentication in the /api/v1/login/auto_login endpoint. The endpoint issues long-lived superuser bearer tokens without requiring authentication when the AUTO_LOGIN configuration is enabled (enabled by default), which may allow an unauthenticated network attacker to obtain full administrative access. Additionally, permissive cross-origin resource sharing (CORS) settings may allow tokens to be exposed to unintended origins, increasing the risk of unauthorized access.

Affected

IBM · Langflow OSS

CVSS v3.1 IBM

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

3.21% chance of exploitation in the next 30 days, 88th percentile

Nuclei

critical · CWE-306

Published

2026-07-17

Updated

2026-07-23

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-9103.yaml

Security advisories

• https://www.ibm.com/support/pages/node/7278926

References

• CVE Record
• NVD entry