Out-of-bounds Write Affecting cluster-api-kubeadm-control-plane-controller package, versions <1.12.7-r1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.17% (7th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-CLUSTERAPIKUBEADMCONTROLPLANECONTROLLER-16673248
  • published14 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-39817  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Minimos:latest cluster-api-kubeadm-control-plane-controller to version 1.12.7-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cluster-api-kubeadm-control-plane-controller package and not the cluster-api-kubeadm-control-plane-controller package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem.

CVSS Base Scores

version 3.1