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CVE-2026-26157

HighPublished

Busybox: busybox: arbitrary file overwrite and potential code execution via incomplete path sanitization

Published: Feb 11, 2026
Updated: Jul 15, 2026
Assigning CNA: redhat
Evidence observed: Apr 30, 2026

Primary CVSS

7.0/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS probability estimate

0.7%

Low · next 30 days

Percentile: 51.6%
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. Incomplete path sanitization in its archive extraction utilities allows an attacker to craft malicious archives that when extracted, and under specific conditions, may write to files outside the intended directory. This can lead to arbitrary file overwrite, potentially enabling code execution through the modification of sensitive system files.

Sources

researchResearch
Personal security research and CVE discoveries
BusyBox 1.37.0 - Path TraversalExploit
Calil Khalil · multiple · Apr 30, 2026

Responsible use

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