7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability (CVE-2026-14266)

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.

This issue has been fixed in 7-Zip 26.02

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