CVE-2026-26157
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.71% probability · 52th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-73
- Source
- secalert@redhat.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.