Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M
CVE-2026-32769Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace
High 7.1
In plain English
A high-severity improper access control in fullchain from ctfer-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/ctfer-io/fullchain | 0.1.1 | GHSA-hxm7-9q36-c77f |
| Go | github.com/ctfer-io/fullchain | 0.1.1 | GO-2026-4715 |
Affected products (as reported)
Weakness: CWE-284 · 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