CVE-2026-32769

CRITICAL

Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace

Title source: cna
STIX 2.1

Description

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.

Scores

CVSS v3 9.8
EPSS 0.0002
EPSS Percentile 5.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-284
Status published
Products (3)
ctfer/fullchain < 0.1.1
ctfer-io/fullchain 0 - 0.1.1Go
ctfer-io/fullchain < 0.1.1
Published Mar 20, 2026
Tracked Since Mar 20, 2026