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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/LycheeOrg/Lychee/commit/76a3f0513eca6458bf7f8c337c1ad65e59b22bcb	Patch
https://github.com/LycheeOrg/Lychee/pull/4264	Issue Tracking Patch
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-4v4c-g2jv-4g25	Exploit Vendor Advisory Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:*

History

23 Apr 2026, 15:05

Type	Values Removed	Values Added
References	~~() https://github.com/LycheeOrg/Lychee/commit/76a3f0513eca6458bf7f8c337c1ad65e59b22bcb -~~	() https://github.com/LycheeOrg/Lychee/commit/76a3f0513eca6458bf7f8c337c1ad65e59b22bcb - Patch
References	~~() https://github.com/LycheeOrg/Lychee/pull/4264 -~~	() https://github.com/LycheeOrg/Lychee/pull/4264 - Issue Tracking, Patch
References	~~() https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-4v4c-g2jv-4g25 -~~	() https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-4v4c-g2jv-4g25 - Exploit, Vendor Advisory, Patch
First Time		Lycheeorg Lycheeorg lychee
CPE		cpe:2.3:a:lycheeorg:lychee::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.3

09 Apr 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-09 17:16

Updated : 2026-04-23 15:05

NVD link : CVE-2026-39957

Mitre link : CVE-2026-39957

CVE.ORG link : CVE-2026-39957

JSON object : View

Products Affected

lycheeorg

lychee

CWE

CWE-863

Incorrect Authorization

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