CVE-2026-32769 HIGH

CVE-2026-32769: Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace

Vendor Ctfer-Io
Product fullchain
Weakness CWE-284
Published March 20, 2026
Last update March 20, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

What the vulnerability does

01Description

Fullchain is an umbrella project for deploying a ready-to-use CTF platform. In versions prior to 0.1.1, due to a mis-written NetworkPolicy, a malicious actor can pivot from a subverted application to any Pod out of the origin namespace. The flawed inter-ns NetworkPolicy breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement. This issue has been fixed in version 0.1.1. To workaround, delete the failing network policy that should be prefixed by inter-ns- in the target namespace.

Key dates

02Disclosure timeline

March 20, 2026 CVE published
March 20, 2026 Record updated