CVE-2026-118668 langgraph-api - Broken Access Control

langgraph-api 0.1.2 to 0.15.0 contains a broken access control caused by improper namespace rewriting in JavaScript/TypeScript custom authentication handlers, letting authenticated users access other users' Store namespaces, exploit requires authentication.

CVSS base score 8.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control, Data Tampering, Information Disclosure
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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
28 October 2026
Updated
29 October 2026
Weakness
CWE-639

Vendor fix

Update to version 0.15.0 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

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