{"id":"CVE-2026-14266","aliases":["DEBIAN-CVE-2026-14266","EUVD-2026-50420","GHSA-836v-xv29-x32v","SUSE-SU-2026:23317-1","SUSE-SU-2026:3869-1","UBUNTU-CVE-2026-14266","openSUSE-SU-2026:11319-1","openSUSE-SU-2026:21641-1"],"status":"published","title":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability","description":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.","severity":{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00742,"percentile":0.55127,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-122"],"published":"2026-07-21T00:00:00Z","modified":"2026-10-17T12:58:05Z","exploits":[{"source":"pocgithub","id":"4minx/CVE-2026-14266","title":"4minx/CVE-2026-14266","date":"2026-07-22","url":"https://github.com/4minx/CVE-2026-14266"},{"source":"pocgithub","id":"liyuxuan504-byte/CVE-2026-14266","title":"liyuxuan504-byte/CVE-2026-14266","date":"2026-07-25","url":"https://github.com/liyuxuan504-byte/CVE-2026-14266"},{"source":"pocgithub","id":"ret2bilibili/CVE-2026-14266","title":"ret2bilibili/CVE-2026-14266","date":"2026-07-18","url":"https://github.com/ret2bilibili/CVE-2026-14266"}],"fixes":[{"ecosystem":"Debian:12","package":"7zip","fixed_in":["22.01+really26.02+dfsg-0+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"7zip","fixed_in":["26.02+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"p7zip","fixed_in":["16.02+really26.02+dfsg-0+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"p7zip","fixed_in":["16.02+transitional.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux 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Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-14266"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-26-444"},{"url":"https://github.com/advisories/GHSA-836v-xv29-x32v"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-14266","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202623317-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1273065","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-14266","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20263869-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-14266","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-14266","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-14266","title":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability","description":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.","status":"published","published":"2026-07-29T17:17:13.649Z","modified":"2026-07-30T03:55:31.679Z","cvss":[{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T13:38:32.13011Z"}],"euvd":[{"id":"EUVD-2026-50420","description":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.","status":"published","published":"2026-07-29T17:17:13Z","modified":"2026-07-30T03:55:31Z","cvss":[{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:02:29.367786Z"}],"ghsa":[{"id":"GHSA-836v-xv29-x32v","title":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This...","description":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.","status":"published","published":"2026-07-29T18:31:40Z","modified":"2026-07-29T18:31:46Z","cvss":[{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:09:54.335538Z"}],"nvd":[{"id":"CVE-2026-14266","description":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.","status":"published","published":"2026-07-29T18:16:50.72Z","modified":"2026-08-07T20:48:32.29Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:33.629616Z"}],"osv":[{"id":"DEBIAN-CVE-2026-14266","description":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.  The specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.","status":"published","published":"2026-07-29T18:16:50.72Z","modified":"2026-10-01T03:02:23.538209222Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:51.8748Z"},{"id":"UBUNTU-CVE-2026-14266","description":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.","status":"published","published":"2026-07-29T18:16:00Z","modified":"2026-10-17T12:58:05.616222547Z","cvss":[{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:00.592716Z"},{"id":"openSUSE-SU-2026:11319-1","title":"7zip-26.02-1.1 on GA media","description":"These are all security issues fixed in the 7zip-26.02-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-07-21T00:00:00Z","modified":"2026-07-22T09:30:06.074675104Z","updated_at":"2026-11-02T16:58:38.95195Z"},{"id":"openSUSE-SU-2026:21641-1","title":"Security update for 7zip","description":"This update for 7zip fixes the following issue:\n\nUpdate to 26.02.\n\n- CVE-2026-14266: heap buffer overflow when processing XZ chunked data can lead to remote code execution (bsc#1273065).\n","status":"published","published":"2026-08-25T06:29:01Z","modified":"2026-08-27T18:23:13.188234034Z","updated_at":"2026-11-02T16:58:41.885092Z"},{"id":"SUSE-SU-2026:23317-1","title":"Security update for 7zip","description":"This update for 7zip fixes the following issue:\n\nUpdate to 26.02.\n\n- CVE-2026-14266: heap buffer overflow when processing XZ chunked data can lead to remote code execution (bsc#1273065).\n","status":"published","published":"2026-08-25T06:29:03Z","modified":"2026-09-10T18:23:09.721298508Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:3869-1","title":"Security update for 7zip","description":"This update for 7zip fixes the following issue:\n\n- CVE-2026-14266: heap buffer overflow when processing XZ chunked data can lead to remote code execution (bsc#1273065).\n\nChanges for 7zip:\n\n- Updated to 26.02.\n","status":"published","published":"2026-08-28T17:50:52Z","modified":"2026-09-10T18:23:16.25506997Z","updated_at":"2026-11-02T15:54:05.392906Z"}]}}