{"id":"CVE-2026-26158","aliases":["AZL-77606","AZL-77613","BELL-CVE-2026-26158","DEBIAN-CVE-2026-26158","EUVD-2026-7020","GHSA-r8f8-4pgh-4m8v","OESA-2026-1544","RHSA-2026:13831","SUSE-SU-2026:0758-1","SUSE-SU-2026:0759-1","SUSE-SU-2026:0872-1","SUSE-SU-2026:0892-1","SUSE-SU-2026:20905-1","UBUNTU-CVE-2026-26158","openSUSE-SU-2026:10231-1","openSUSE-SU-2026:20387-1"],"status":"published","title":"Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries","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. 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rst2428p"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:13831","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-26158","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439040","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb","tags":["article"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26158.json","tags":["x_sadp-csaf-vex"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26158","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-r8f8-4pgh-4m8v"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-26158","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-26158","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1544","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26157","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-26157","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_13831.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439039","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-26157","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-26158","tags":["advisory","report"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20260758-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1258163","tags":["report"]},{"url":"https://bugzilla.suse.com/1258167","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-26157","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-26158","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20260759-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20260872-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1192869","tags":["report"]},{"url":"https://bugzilla.suse.com/1217580","tags":["report"]},{"url":"https://bugzilla.suse.com/1217584","tags":["report"]},{"url":"https://bugzilla.suse.com/1217585","tags":["report"]},{"url":"https://bugzilla.suse.com/1241661","tags":["report"]},{"url":"https://bugzilla.suse.com/1253245","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-42380","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-42363","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-42364","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-42365","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-46394","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-60876","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20260892-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202620905-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-26158","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-26158","title":"Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries","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.","status":"published","published":"2026-02-11T20:27:06.979Z","modified":"2026-11-04T22:15:35.293Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-73","CWE-73"],"updated_at":"2026-11-04T23:40:09.798467Z"}],"euvd":[{"id":"EUVD-2026-7020","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.","status":"published","published":"2026-02-11T20:27:06Z","modified":"2026-11-04T22:15:35Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-04T23:47:18.620008Z"}],"ghsa":[{"id":"GHSA-r8f8-4pgh-4m8v","title":"A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the...","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.","status":"published","published":"2026-02-11T21:30:42Z","modified":"2026-06-30T03:36:36Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T15:09:04.668745Z"}],"nvd":[{"id":"CVE-2026-26158","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.","status":"published","published":"2026-02-11T21:16:21.607Z","modified":"2026-11-04T23:17:26.2Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-73"],"updated_at":"2026-11-05T01:45:09.431178Z"}],"osv":[{"id":"BELL-CVE-2026-26158","status":"published","published":"2026-02-15T06:08:54.627793Z","modified":"2026-10-22T08:30:03.399119037Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:23.315185Z"},{"id":"DEBIAN-CVE-2026-26158","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.","status":"published","published":"2026-02-11T21:16:21.607Z","modified":"2026-11-05T09:47:26.898265684Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-05T13:31:49.170436Z"},{"id":"OESA-2026-1544","title":"busybox security update","description":"The Swiss Army Knife of Embedded Linux\r\n\r\nSecurity Fix(es):\n\nA 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.(CVE-2026-26157)\n\nA 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.(CVE-2026-26158)","status":"published","published":"2026-03-15T11:10:33Z","modified":"2026-08-18T01:19:36.312924412Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:45.721983Z"},{"id":"RHSA-2026:13831","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-05-06T10:05:39Z","modified":"2026-10-09T10:19:15Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:18.066978Z"},{"id":"UBUNTU-CVE-2026-26158","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.","status":"published","published":"2026-02-11T21:16:00Z","modified":"2026-10-17T12:56:12.591321044Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:08.726452Z"},{"id":"AZL-77606","title":"CVE-2026-26158 affecting package busybox for versions less than 1.35.0-17","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.","status":"published","published":"2026-02-11T21:16:21Z","modified":"2026-04-21T04:34:18.60222Z","updated_at":"2026-11-02T15:28:09.747541Z"},{"id":"AZL-77613","title":"CVE-2026-26158 affecting package busybox for versions less than 1.36.1-22","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.","status":"published","published":"2026-02-11T21:16:21Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:24.626116Z"},{"id":"openSUSE-SU-2026:10231-1","title":"busybox-1.37.0-9.1 on GA media","description":"These are all security issues fixed in the busybox-1.37.0-9.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-02-20T00:00:00Z","modified":"2026-03-23T04:54:35.676633Z","updated_at":"2026-11-02T16:58:38.101535Z"},{"id":"openSUSE-SU-2026:20387-1","title":"Security update for busybox","description":"This update for busybox fixes the following issues:\n\nChanges in busybox:\n\n- CVE-2026-26157: Fixed arbitrary file overwrite and potential code execution via incomplete path sanitization. (bsc#1258163)\n- CVE-2026-26158: Fixed arbitrary file modification and privilege escalation via unvalidated tar archive entries. (bsc#1258167)\n","status":"published","published":"2026-03-18T15:29:19Z","modified":"2026-03-26T17:23:49.852078Z","updated_at":"2026-11-02T16:58:41.463445Z"},{"id":"SUSE-SU-2026:0758-1","title":"Security update for busybox","description":"This update for busybox fixes the following issues:\n\n- CVE-2026-26157: Arbitrary file overwrite and potential code execution via incomplete path sanitization (bsc#1258163).\n- CVE-2026-26158: Arbitrary file modification and privilege escalation via unvalidated tar archive entries\n  (bsc#1258167).\n","status":"published","published":"2026-03-03T12:16:05Z","modified":"2026-03-04T22:16:27.592237Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:0759-1","title":"Security update for busybox","description":"This update for busybox fixes the following issues:\n\n- CVE-2026-26157: Arbitrary file overwrite and potential code execution via incomplete path sanitization (bsc#1258163).\n- CVE-2026-26158: Arbitrary file modification and privilege escalation via unvalidated tar archive entries\n  (bsc#1258167).\n","status":"published","published":"2026-03-03T12:16:46Z","modified":"2026-03-04T22:16:31.215897Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:0872-1","title":"Security update for busybox","description":"This update for busybox fixes the following issues:\n\n- CVE-2023-42363: use-after-free vulnerability in xasprintf function in xfuncs_printf.c (bsc#1217580).\n- CVE-2023-42364: use-after-free in the awk.c evaluate function (bsc#1217584).\n- CVE-2023-42365: use-after-free in the awk.c copyvar function (bsc#1217585).\n- CVE-2025-46394: files in a TAR archive can have their filenames hidden from a listing if terminal escape sequences are\n  used when naming other files included in the archive (bsc#1241661).\n- CVE-2025-60876: request line incorrectly neutralized mat lead to header injection (bsc#1253245).\n- CVE-2026-26157: Arbitrary file overwrite and potential code execution via incomplete path sanitization (bsc#1258163).\n- CVE-2026-26158: Arbitrary file modification and privilege escalation via unvalidated tar archive entries\n  (bsc#1258167).\n- CVE-2021-42380: Additional fix for use-after-realloc in awk (bsc#1192869).\n","status":"published","published":"2026-03-11T17:06:34Z","modified":"2026-03-13T08:48:08.874834Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:0892-1","title":"Security update for busybox","description":"This update for busybox fixes the following issues:\n\n- CVE-2023-42363: use-after-free vulnerability in xasprintf function in xfuncs_printf.c (bsc#1217580).\n- CVE-2023-42364: use-after-free in the awk.c evaluate function (bsc#1217584).\n- CVE-2023-42365: use-after-free in the awk.c copyvar function (bsc#1217585).\n- CVE-2025-46394: files in a TAR archive can have their filenames hidden from a listing if terminal escape sequences are\n  used when naming other files included in the archive (bsc#1241661).\n- CVE-2025-60876: request line incorrectly neutralized mat lead to header injection (bsc#1253245).\n- CVE-2026-26157: Arbitrary file overwrite and potential code execution via incomplete path sanitization (bsc#1258163).\n- CVE-2026-26158: Arbitrary file modification and privilege escalation via unvalidated tar archive entries\n  (bsc#1258167).\n- CVE-2021-42380: Additional fix for use-after-realloc in awk (bsc#1192869).\n","status":"published","published":"2026-03-13T09:05:08Z","modified":"2026-03-14T08:15:58.719824Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:20905-1","title":"Security update for busybox","description":"This update for busybox fixes the following issues:\n\nChanges in busybox:\n\n- CVE-2026-26157: Fixed arbitrary file overwrite and potential code execution via incomplete path sanitization. (bsc#1258163)\n- CVE-2026-26158: Fixed arbitrary file modification and privilege escalation via unvalidated tar archive entries. (bsc#1258167)\n","status":"published","published":"2026-03-18T15:27:18Z","modified":"2026-04-02T17:33:50.352834Z","updated_at":"2026-11-02T15:54:01.953589Z"}]}}