CVE-2026-104873 LangGraph Python SDK - Broken Access Control

LangGraph Python SDK 0.1.45 to 0.4.4 contains a broken access control caused by resource-scoped authorization decorators ignoring the actions argument, letting authenticated users bypass permission checks to access others' resources, exploit requires use of affected decorators with actions.

CVSS base score 7.6 /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
Broken Access Control, Information Disclosure, Data Tampering
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/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
2 October 2026
Updated
15 October 2026
Weakness
CWE-863

Vendor fix

Upgrade to version 0.4.4 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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