CVE-2026-39957
Last modified
CVE-2026-39957 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lycheeorg | Lychee | < 7.5.4 |
References
- https://github.com/LycheeOrg/Lychee/pull/4264Issue Tracking, Patch
- https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-4v4c-g2jv-4g25Exploit, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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