CVE-2026-39957

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 4.3
EPSS 0.0021
EPSS Percentile 10.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (2)
lycheeorg/lychee < 7.5.4
LycheeOrg/Lychee < 7.5.4
Published Apr 09, 2026
Tracked Since Apr 09, 2026