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LOW severity

kubectl ANSI escape characters not filteredGHSA-f9jg-8p32-2f55

LOWFix: kubernetes/kubernetes#112553

GHSA-f9jg-8p32-2f55 is a low-severity (CVSS 3) CWE-150 vulnerability in k8s.io/kubernetes. A fix is available for k8s.io/kubernetes — see the affected versions and patch details below.

Also known asCVE-2021-25743GO-2022-0983
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs55th percentile — riskier than 55% of all scored CVEsHighest risk
0.00%0.43%0.86%1.29%0.3%0.8%Apr 26Aug 26Oct 26

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

How urgent is this, really

GHSA-f9jg-8p32-2f55 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

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

kubectl (k8s.io/kubernetes/pkg/kubectl) does not neutralize escape, meta or control sequences contained in the raw data it outputs to a terminal. This includes but is not limited to the unstructured string fields in objects such as Events.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gok8s.io/kubernetesall versions1.26.0-alpha.3go get k8s.io/kubernetes@v1.26.0-alpha.3

Affected Products

1 product · 4 configurations
Application
kuberneteskubernetes
≤ 1.25.0
1 version
1.26.0

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 1.26.0-alpha.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f9jg-8p32-2f55 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.

Frequently Asked Questions

kubectl (k8s.io/kubernetes/pkg/kubectl) does not neutralize escape, meta or control sequences contained in the raw data it outputs to a terminal. This includes but is not limited to the unstructured string fields in objects such as Events.
O3 Security · Impact-Aware SCA

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kubectl ANSI escape characters not filtered (Low 3)