CVE-2026-26157
published 2026-02-11CVE-2026-26157: A flaw was found in BusyBox. Incomplete path sanitization in its archive extraction utilities allows an attacker to craft malicious archives that when…
PriorityP343high7CVSS 3.1
AVLACHPRNUIRSUCHIHAH
EXPLOIT
EPSS
0.68%
47.8th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| busybox | busybox | >= 0 < 1:1.37.0-10.1 | 1:1.37.0-10.1 |
| debian | busybox | < busybox 1:1.37.0-10.1 (forky) | busybox 1:1.37.0-10.1 (forky) |
CVSS provenance
nvdv3.17.0HIGHCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
osv7.0HIGH
vendor_debian7.0HIGH
vendor_redhat7.0HIGH
CVEs like this are exactly what “Exploited This Week” covers.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
BusyBox Archive Extraction file inclusion (EDB-52538 / Nessus ID 298800)
vuldb·2026-05-06·CVSS 7.0
CVE-2026-26157 [HIGH] BusyBox Archive Extraction file inclusion (EDB-52538 / Nessus ID 298800)
A vulnerability, which was classified as problematic, has been found in BusyBox. This issue affects some unknown processing of the component Archive Extraction Handler. Performing a manipulation results in file inclusion.
This vulnerability is identified as CVE-2026-26157. The attack can be initiated remotely. Additionally, an exploit exists.
It is recommended to apply a patch to fix this issue.
OSV
CVE-2026-26157: A flaw was found in BusyBox
osv·2026-02-11·CVSS 7.0
CVE-2026-26157 [HIGH] CVE-2026-26157: A flaw was found in BusyBox
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.
GHSA
GHSA-xm63-5pjx-vrhp: A flaw was found in BusyBox
ghsa_unreviewed·2026-02-11
CVE-2026-26157 [HIGH] CWE-73 GHSA-xm63-5pjx-vrhp: A flaw was found in BusyBox
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.
Red Hat
busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization
vendor_redhat·2026-02-11·CVSS 7.0
CVE-2026-26157 [HIGH] CWE-73 busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization
busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization
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.
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 execu
Debian
CVE-2026-26157: busybox - A flaw was found in BusyBox. Incomplete path sanitization in its archive extract...
vendor_debian·2026·CVSS 7.0
CVE-2026-26157 [HIGH] CVE-2026-26157: busybox - A flaw was found in BusyBox. Incomplete path sanitization in its archive extract...
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.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 1:1.37.0-10.1)
sid: resolved (fixed in 1:1.37.0-10.1)
trixie: open
No detection rules found.
Bugzilla
CVE-2026-26157 busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization [fedora-42]
bugzilla·2026-02-11·CVSS 7.0
CVE-2026-26157 [HIGH] CVE-2026-26157 busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization [fedora-42]
CVE-2026-26157 busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it
Bugzilla
CVE-2026-26157 busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization
bugzilla·2026-02-11·CVSS 7.0
CVE-2026-26157 [HIGH] CVE-2026-26157 busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization
CVE-2026-26157 busybox: BusyBox: Arbitrary file overwrite and potential code execution via incomplete path sanitization
Affects: BusyBox v1.36.1 and v1.37.0 (likely affects earlier versions too)
CVSS: 8.6 (HIGH)
Component: strip_unsafe_prefix() function in archive extraction utilities
(tar, unzip, rpm, ar, dpkg)
Description:
Incomplete path sanitization fails to detect trailing ".." components in
filenames (e.g., "logs/data/.."), allowing files to be written outside the
intended extraction directory when the current working directory matches
the target location. An attacker can craft malicious archives that
overwrite arbitrary files within the extraction directory scope.
Impact:
Arbitrary file overwrite, potential code execution through modification of
shell configuration files, cron jo
Wiz
CVE-2026-26157 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.8
CVE-2026-26157 [HIGH] CVE-2026-26157 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-26157 :
CBL Mariner vulnerability analysis and mitigation
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.
Source : NVD
## 7
Score
Published February 11, 2026
Severity HIGH
CNA Score 7.0
Affected Technologies
CBL Mariner
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 0.3
Exploitation Probability (EPSS) N/A
Affected packages and libraries
https://access.redhat.com/errata/RHSA-2026:13831https://access.redhat.com/security/cve/CVE-2026-26157https://bugzilla.redhat.com/show_bug.cgi?id=2439039https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cbhttps://access.redhat.com/errata/RHSA-2026:13831https://access.redhat.com/security/cve/CVE-2026-26157https://bugzilla.redhat.com/show_bug.cgi?id=2439039https://cert-portal.siemens.com/productcert/html/ssa-253495.htmlhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26157.json
2026-02-11
Published