CVE-2026-26158
Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries
- Published
- Feb 11, 2026
- Updated
- Jul 15, 2026
- Assigning CNA
- redhat
- Evidence observed
- Aug 28, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 6.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- researchResearch
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