---
id: CVE-2026-26157
title: A flaw was found in BusyBox
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 dire…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-73
  - CWE-73
published: '2026-02-11'
updated: '2026-06-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-26157'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:13831'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-26157'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2439039'
    label: secalert@redhat.com
  - url: >-
      https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:13831'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-26157'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2439039'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-253495.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26157.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
  - exploit-available
epss: 0.00602
epssPercentile: 0.46544
exploitAvailable: true
ingestedAt: '2026-07-03T18:53:52.206Z'
exploits:
  exploitdb: true
  checkedAt: '2026-09-26T09:05:40.820Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.