CVE-2026-105699 Langflow - Broken Access Control

Langflow 1.6.8 to 1.9.1 contains a broken access control vulnerability caused by lack of authorization checks on resource URIs in project-scoped MCP connections, letting authenticated users access other users' private flow files, exploit requires authenticated access to any project-scoped MCP endpoint.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.25% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-639

Vendor fix

Update to version 1.9.1 or later.

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

← All CVEs