External Control of File Name or Path Affecting busybox package, versions <1.37.0-r58


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-BUSYBOX-17328141
  • published12 Jun 2026
  • disclosed11 Feb 2026

Introduced: 11 Feb 2026

CVE-2026-26158  (opens in a new tab)
CWE-73  (opens in a new tab)

How to fix?

Upgrade Chainguard busybox to version 1.37.0-r58 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream busybox package and not the busybox package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.

CVSS Base Scores

version 3.1