Vulnerability in Ctfer Fullchain
CVE-2026-32769
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Ctfer Fullchain
- Ctfer-Io Fullchain — versions < 0.1.1
Weakness classification (CWE)
References
- github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f (Exploit, Vendor Advisory)
- github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51 (Patch)
- github.com/ctfer-io/fullchain/releases/tag/v0.1.1 (Release Notes)
Frequently asked questions
- What is CVE-2026-32769?
- CVE-2026-32769 is a critical-severity vulnerability in Ctfer Fullchain, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-03-20.
- How severe is CVE-2026-32769?
- Critical severity. CVSS v3 base score is 9.8 out of 10.