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.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- CVSS 3.0 Base Score: 7
- CVSS 3.0 Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| 7 Zip 7 Zip | — | Upgrade 7-Zip to the latest version | Jul 30, 2026 | Jul 29, 2026 |
| Amazon_linux_2023 | — | Upgrade 7zip-debuginfoUpgrade 7zip-reduced-debuginfoUpgrade 7zip-reducedUpgrade 7zip-standalone-debuginfoUpgrade 7zip-standaloneUpgrade 7zip-standalone-allUpgrade 7zipUpgrade 7zip-debugsourceUpgrade 7zip-standalone-all-debuginfo | Aug 10, 2026 | Jul 29, 2026 |
| Debian | — | Upgrade p7zipUpgrade 7zip | Jul 23, 2026 | Jul 23, 2026 |
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