{"id":"CVE-2026-14266","state":"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.","publishedAt":"2026-07-29T17:17:13.649Z","updatedAt":"2026-07-30T03:55:31.679Z","severity":{"score":7,"label":"High","version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","source":"zdi"},"assigner":"zdi","products":["7-Zip 7-Zip"],"affected":[{"vendor":"7-Zip","product":"7-Zip","defaultStatus":"unknown","versions":[{"version":"26.01","status":"affected"}]}],"references":["https://www.zerodayinitiative.com/advisories/ZDI-26-444/","http://www.openwall.com/lists/oss-security/2026/07/17/12"],"weaknesses":["CWE-122"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/14xxx/CVE-2026-14266.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-14266","state":"PUBLISHED","datePublished":"2026-07-29T17:17:13.649Z","dateUpdated":"2026-07-30T03:55:31.679Z","assignerShortName":"zdi","assignerOrgId":"99f1926a-a320-47d8-bbb5-42feb611262e","dateReserved":"2026-06-30T18:43:50.027Z"},"containers":{"cna":{"title":"7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"7-Zip","product":"7-Zip","defaultStatus":"unknown","versions":[{"version":"26.01","status":"affected"}]}],"references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-26-444/","name":"ZDI-26-444","tags":["x_research-advisory"]}],"metrics":[{"format":"CVSS","cvssV3_0":{"version":"3.0","vectorString":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","lang":"en","description":"CWE-122: Heap-based Buffer Overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"zdi","orgId":"99f1926a-a320-47d8-bbb5-42feb611262e","dateUpdated":"2026-07-29T17:17:13.649Z"},"dateAssigned":"2026-06-30T18:43:50.105Z","datePublic":"2026-07-15T21:47:29.811Z","source":{"lang":"en","value":"Lunbun LLC (Landon Peng)"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/07/17/12"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-07-29T17:30:32.742Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-29T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-14266"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-30T03:55:31.679Z"}}]}}}