CVE-2026-86831 Amazon EKS Network Policy Agent - Broken Access Control

Amazon EKS Network Policy Agent < 1.4.0 contains a broken access control caused by improper validation of pod identifier uniqueness, letting authenticated remote users bypass NetworkPolicy enforcement on co-located pods via crafted pod and namespace names.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.64% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-1289

Vendor fix

Upgrade to Amazon EKS Network Policy Agent 1.4.0 or later and Amazon VPC CNI Managed Add-on v1.22.4 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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