CVE-2026-39957 | THREATINT

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.

PUBLISHED Reserved 2026-04-07 | Published 2026-04-09 | Updated 2026-04-09 | Assigner GitHub_M

LOW: 2.3CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-863: Incorrect Authorization

Product status

< 7.5.4

affected

References

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

github.com/LycheeOrg/Lychee/pull/4264

github.com/...ommit/76a3f0513eca6458bf7f8c337c1ad65e59b22bcb

cve.org (CVE-2026-39957)

nvd.nist.gov (CVE-2026-39957)

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