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    CVE-2026-14266

    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.

    Published:Jul 29, 2026
    Last Modified:Jul 29, 2026
    EPS:Jul 29, 2026
    EPSS Score:
    CVSS Score:7

    Affected Products

    Vendor
    7-zip
    Product
    7-zip

    Exploits

    https://github.com/4minx/CVE-2026-14266https://github.com/hg0434hongzh0/CVE-2026-14266https://github.com/liyuxuan504-byte/CVE-2026-14266

    Common Weakness Enumeration

    CWE-122 Heap-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

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    CVE-2026-48103 (CVSS 4.3) — 7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap…
    CVE-2026-48102 (CVSS 3.1) — 7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-boun…
    CVE-2026-48101 (CVSS 6.5) — 7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialize…
    CVE-2026-48095 (CVSS 8.8) — 7-Zip is a file archiver with a high compression ratio. Versions 26.00 and prior contain a heap buffer overflo…
    CVE-2026-48092 (CVSS 4.3) — 7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disc…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High