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    CVE-2026-39957

    Lychee is a free, open-source photo-management tool. Prior to 7.5.4, a SQL operator-precedence bug in SharingController::listAll() causes the orWhereNotNull('user_group_id') clause to escape the ownership filter applied by the when() block. Any authenticated non-admin user with upload permission who owns at least one album can retrieve all user-group-based sharing permissions across the entire instance, including private albums owned by other users. This vulnerability is fixed in 7.5.4.

    Published:Apr 9, 2026
    Last Modified:Apr 23, 2026
    EPS:Apr 9, 2026
    EPSS Score:0.00033
    CVSS Score:4.3

    Affected Products

    Vendor
    Lycheeorg
    Product
    Lychee

    Exploits

    https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-4v4c-g2jv-4g25

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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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