CVE-2026-32769CRITICAL 9.8EPSS p38.8%

CVE-2026-32769CVE-2026-32769

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.50% probability of exploitation · percentile 38.8% · 2026-06-19T12:03:05Z
Published2026-03-20
Last modified2026-04-16

Underlying weaknesses· 1

CWE-284

References

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

1

TypeTargetConfidenceTier
WeaknessImproper Access Controlcwe-2840%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.