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OpenAdvisories
Low · 2.3 CVE-2026-39957 EUVD-2026-20954

Lychee has Broken Access Control in SharingController::listAll() leaks private album sharing metadata to unauthorized users

Published Apr 9, 2026 · Updated Apr 9, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
LycheeOrg Lychee < 7.5.4 —

References