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CVE-2026-9103

Langflow authentication bypass

9.8 CRITICALEPSS 3.21%
  1. Published17 Jul 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Langflow≥ 1.0.0 < 1.10.1

Remediation

Fixed in
Langflow≥ 1.10.1

References

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Frequently asked

Is CVE-2026-9103 being actively exploited?

CVE-2026-9103 is not in the CISA KEV catalog. Its EPSS exploit probability is 3.21%.

How severe is CVE-2026-9103?

CVE-2026-9103 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 3.21% probability of exploitation.

Which products are affected by CVE-2026-9103?

Affected products include Langflow.

How do I fix CVE-2026-9103?

Upgrade affected software to a fixed version, for example Langflow 1.10.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.