What’s Vulnerable › Vulnerabilities

CVE-2026-26157: Busybox: busybox: arbitrary file overwrite and potential code execution via incomplete path sanitization

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-11 · updated 2026-07-15
• Weakness: CWE-73

Description

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 products

• Red Hat Hardened Images: all versions — fixed in 1.37.0-7.2.hum1

How to fix

Upgrade to a fixed version: Red Hat Hardened Images 1.37.0-7.2.hum1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:13831
• https://access.redhat.com/security/cve/CVE-2026-26157
• https://bugzilla.redhat.com/show_bug.cgi?id=2439039
• https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb
• https://access.redhat.com/errata/RHSA-2026:13831
• https://access.redhat.com/security/cve/CVE-2026-26157
• https://bugzilla.redhat.com/show_bug.cgi?id=2439039
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26157.json

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