{"affected":[{"defaultStatus":"affected","ecosystem":"https://catalog.redhat.com/software/containers/","packageName":"busybox-main","product":"Red Hat Hardened Images","source":"CNA: redhat","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1.37.0-7.2.hum1","versionType":"rpm"}]},{"defaultStatus":"unknown","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"busybox","product":"Red Hat Enterprise Linux 6","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unknown","product":"RUGGEDCOM RST2428P","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"V4.0","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"busybox-main","product":"Red Hat Hardened Images","source":"ADP: redhat-SADP","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1.37.0-7.2.hum1","versionType":"rpm"}]},{"defaultStatus":"unknown","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"busybox","product":"Red Hat Enterprise Linux 6","source":"ADP: redhat-SADP","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-26158","cwes":["CWE-73"],"description":"A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.","epss":{"date":"2026-11-04","percentile":0.09038,"score":0.00193},"exploits":[],"kev":null,"metrics":[{"score":7,"severity":"high","source":"CNA: redhat","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},{"score":7,"severity":"high","source":"ADP: redhat-SADP","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},{"score":7,"severity":"high","source":"NVD: secalert@redhat.com","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},{"score":7,"severity":"high","source":"NVD: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793834246200,"publishedAt":1770841626979,"references":[{"source":"CNA: redhat","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:13831"},{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-26158"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439040"},{"source":"CNA: redhat","tags":[],"url":"https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html"},{"source":"ADP: redhat-SADP","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-26158"},{"source":"ADP: redhat-SADP","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439040"},{"source":"ADP: redhat-SADP","tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26158.json"},{"source":"ADP: redhat-SADP","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:13831"},{"source":"secalert@redhat.com","tags":[],"url":"https://access.redhat.com/errata/RHSA-2026:13831"},{"source":"secalert@redhat.com","tags":[],"url":"https://access.redhat.com/security/cve/CVE-2026-26158"},{"source":"secalert@redhat.com","tags":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439040"},{"source":"secalert@redhat.com","tags":[],"url":"https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","tags":[],"url":"https://access.redhat.com/errata/RHSA-2026:13831"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","tags":[],"url":"https://access.redhat.com/security/cve/CVE-2026-26158"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","tags":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439040"},{"source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","tags":[],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26158.json"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"As a prevention measure, avoid extracting tar archives from untrusted sources using BusyBox, especially when operating with elevated privileges. If processing untrusted archives is unavoidable, ensure that the extraction process is performed within a strictly sandboxed environment with minimal permissions. This operational control reduces the risk of arbitrary file modification and privilege escalation."},{"kind":"fix","source":"ADP: redhat-SADP","text":"RHSA-2026:13831: Red Hat Hardened Images"},{"kind":"workaround","source":"ADP: redhat-SADP","text":"As a prevention measure, avoid extracting tar archives from untrusted sources using BusyBox, especially when operating with elevated privileges. If processing untrusted archives is unavoidable, ensure that the extraction process is performed within a strictly sandboxed environment with minimal permissions. This operational control reduces the risk of arbitrary file modification and privilege escalation."}],"revision":"f13cd1e9895f27e593b562b6eda60c37ff1ae98a761827f2e6c9aeb05123582d","sources":[{"modifiedAt":1793830535293,"name":"CNA: redhat","retrievedAt":1793833813051,"url":"https://www.cve.org/CVERecord?id=CVE-2026-26158"},{"modifiedAt":1793834246200,"name":"NVD","retrievedAt":1793837956851,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26158"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793833837295,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-26158"}],"ssvc":{"assessedAt":1770872124841,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries","updatedAt":1793837956851}