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    CVE-2026-52886

    Notepad++ is a free and open-source source code editor. Prior to 8.9.7, Notepad++ validates the backupFilePath attribute from session.xml with std::wstring::starts_with against the expected backup directory without path normalization, allowing parent-directory sequences during snapshot-mode restoration to read an arbitrary user-readable file outside the backup directory into an editor tab. This issue is fixed in version 8.9.7.

    Published:Aug 17, 2026
    Last Modified:Aug 24, 2026
    EPS:Aug 17, 2026
    EPSS Score:0.00238
    CVSS Score:5.1

    Affected Products

    Vendor
    Notepad-plus-plus
    Product
    Notepad++

    Exploits

    https://github.com/v3s9er/CVE-2026-52886

    Related CVEs

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    CVE-2026-71858 (CVSS 5.4) — Notepad++ is a free and open-source source code editor. Prior to 8.9.7, macros loaded from an attacker-control…
    CVE-2026-54758 (CVSS 7.8) — Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the expandNppEnvironmentStrs function …
    CVE-2026-73250 (CVSS 5.4) — Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64…
    CVE-2026-48770 (CVSS 5) — Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, a local process in the same interact…
    CVE-2026-48778 (CVSS 7.8) — Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <GUIConfig name="commandLineInte…
    CVE-2026-52885 (CVSS 7.5) — Notepad++ is a free and open-source source code editor. Prior to 8.9.6.4, NppCommands.cpp checks the HMAC of t…
    CVE-2026-46710 (CVSS 7.5) — Notepad++ is a free and open-source source code editor. From 8.9.4 until 8.9.6, Notepad++ contains a local pri…
    CVE-2026-48800 (CVSS 7.8) — Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <Command> tag text content insid…
    CVE-2026-52884 (CVSS 7.8) — Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonical…

    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