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    CVE-2026-86257

    wger before 2.6 fails to sanitize first_name and last_name fields in the gym member TSV export endpoint, allowing any gym member to inject spreadsheet formulas. Attackers can inject formulas like =HYPERLINK to exfiltrate admin data or execute code when admins open the exported file in Excel or LibreOffice Calc.

    Published:Sep 6, 2026
    Last Modified:Sep 8, 2026
    EPS:Sep 6, 2026
    EPSS Score:0.00167
    CVSS Score:5.4

    Affected Products

    Vendor
    Wger
    Product
    Wger

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-27839 (CVSS 4.3) — wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, three `nutrition…
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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