EUVD-2026-20954

| CVE-2026-39957 LOW
2026-04-09 GitHub_M
2.3
CVSS 4.0

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
EUVD ID Assigned
Apr 09, 2026 - 16:30 euvd
EUVD-2026-20954
Analysis Generated
Apr 09, 2026 - 16:30 vuln.today
CVE Published
Apr 09, 2026 - 16:14 nvd
LOW 2.3

Tags

Authentication Bypass Lychee

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.

Analysis

SQL operator-precedence bug in Lychee prior to 7.5.4 allows authenticated users with upload permission to bypass ownership filters and retrieve all user-group-based sharing permissions across the instance, including private albums owned by other users. The vulnerability exists in SharingController::listAll() where an orWhereNotNull clause escapes the ownership filter applied by a when() block. …

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Priority Score

12
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +12
POC: 0

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EUVD-2026-20954 vulnerability details – vuln.today
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