CVE-2026-9103
CriticalIBM 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.
Published Jul 17, 2026 · Updated Jul 23, 2026
Key Facts
Patch in the next maintenance window- CVE-2026-9103 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Langflow Oss (Ibm), Langflow.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 3.2% probability of exploitation in the next 30 days.
- Fixed versions are available, including Langflow 1.10.1.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
3.2%
Higher than 87.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
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 Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Langflow OssIbm | 1.0.0, 1.10.0 | n/a |
| LangflowLangflow | See advisory | 1.10.1 |
Patched Releases
Langflow
1.10.1
Timeline
Publicly disclosed
Jul 17, 2026
Last updated
Jul 23, 2026
Weakness Type
- CWE-306 Missing Authentication for Critical Function
References
FAQ
Common Questions.
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.
Affected: Langflow Oss (Ibm) versions 1.0.0, 1.10.0; Langflow. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Langflow 1.10.1.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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