ctfer-io fullchain up to 0.1.0 access control

Summaryinfo

A vulnerability, which was classified as critical, was found in ctfer-io fullchain up to 0.1.0. The impacted element is an unknown function. The manipulation results in access control. This vulnerability is cataloged as CVE-2026-32769. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in ctfer-io fullchain up to 0.1.0. Affected is some unknown functionality. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-32769 since 03/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/23/2026). The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 0.1.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• ctfer-io

Name

• fullchain

Version

• 0.1.0

License

• open-source

Website

• Product: https://github.com/ctfer-io/fullchain/

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