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MEDIUM severity

Kubernetes arbitrary file overwriteGHSA-2jq6-ffph-p4h8

MEDIUM

GHSA-2jq6-ffph-p4h8 is a medium-severity (CVSS 5.5) Improper Input Validation vulnerability in k8s.io/kubernetes. A fix is available for k8s.io/kubernetes — see the affected versions and patch details below.

Also known asCVE-2018-1002100GO-2023-1959
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs77th percentile — riskier than 77% of all scored CVEsHighest risk
0.01%0.74%1.47%2.20%0.5%1.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹k8s.io/kubernetes

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

In Kubernetes versions 1.5.x, 1.6.x, 1.7.x, 1.8.x, and prior to version 1.9.6, the kubectl cp command insecurely handles tar data returned from the container, and can be caused to overwrite arbitrary local files.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gok8s.io/kubernetes≥ 1.5.0-alpha.0&&< 1.9.61.9.6go get k8s.io/kubernetes@v1.9.6

Affected Products

1 product · 5 configurations
Application
kuberneteskubernetes
≥ 1.9.0 && ≤ 1.9.5
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for k8s.io/kubernetes, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update k8s.io/kubernetes to 1.9.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2jq6-ffph-p4h8 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Kubernetes support is moving from Red Hat Enterprise Linux to OpenShift Container Platform. Kubernetes and its dependencies will no longer be updated through the Extras channel. Instead, the Red Hat customers are advised to use Red Hat's supported Kubernetes-based products such as Red Hat OpenShift Container Platform.

ProductFixed inAdvisory
Red Hat OpenShift Container Platform 3.9atomic-openshift-0:3.9.30-1.git.0.dec1ba7.el7RHBA-2018:1796

Frequently Asked Questions

In Kubernetes versions 1.5.x, 1.6.x, 1.7.x, 1.8.x, and prior to version 1.9.6, the kubectl cp command insecurely handles tar data returned from the container, and can be caused to overwrite arbitrary local files.
O3 Security · Impact-Aware SCA

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Kubernetes arbitrary file overwrite (Medium 5.5)