CVE-2026-26158External Control of File Name or Path in Busybox

Severity
7.0HIGHNVD
EPSS
0.0%
top 99.70%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedFeb 11

Description

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 vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages2 packages

debiandebian/busybox< busybox 1:1.37.0-10.1 (forky)
Debianbusybox/busybox< 1:1.37.0-10.1

🔴Vulnerability Details

2
GHSA
GHSA-r8f8-4pgh-4m8v: A flaw was found in BusyBox2026-02-11
OSV
CVE-2026-26158: A flaw was found in BusyBox2026-02-11

📋Vendor Advisories

2
Red Hat
busybox: BusyBox: Arbitrary file modification and privilege escalation via unvalidated tar archive entries2026-02-11
Debian
CVE-2026-26158: busybox - A flaw was found in BusyBox. This vulnerability allows an attacker to modify fil...2026

🕵️Threat Intelligence

1
Wiz
CVE-2026-26158 Impact, Exploitability, and Mitigation Steps | Wiz