CVE-2026-81268 IBM Langflow OSS - Authentication Bypass

IBM Langflow OSS 1.0.0 through 1.11.5 contains an authentication bypass caused by insufficient session expiration of API keys after user deactivation, letting remote authenticated attackers execute flows and obtain sensitive information.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.43% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
10 September 2026
Updated
15 October 2026
Weakness
CWE-613

Vendor fix

Update to a version later than 1.11.5 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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