What’s Vulnerable › Vulnerabilities

CVE-2022-24877: Improper path handling in kustomization files allows path traversal

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-06 · updated 2026-06-17
• Weakness: CWE-22

Description

Flux is an open and extensible continuous delivery solution for Kubernetes. Path Traversal in the kustomize-controller via a malicious `kustomization.yaml` allows an attacker to expose sensitive data from the controller’s pod filesystem and possibly privilege escalation in multi-tenancy deployments. Workarounds include automated tooling in the user's CI/CD pipeline to validate `kustomization.yaml` files conform with specific policies. This vulnerability is fixed in kustomize-controller v0.24.0 and included in flux2 v0.29.0.

Affected products

• fluxcd flux2: before 0.29.0 — fixed in 0.29.0
• fluxcd kustomize-controller: before 0.24.0 — fixed in 0.24.0

How to fix

Upgrade to a fixed version: fluxcd flux2 0.29.0; fluxcd kustomize-controller 0.24.0. Check the vendor advisory for mitigations.

References

• https://github.com/fluxcd/flux2/security/advisories/GHSA-j77r-2fxf-5jrw
• https://github.com/fluxcd/flux2/security/advisories/GHSA-j77r-2fxf-5jrw

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