CVE-2026-39957

LOW EPSS 10.9%
Published Apr 9, 20262mo ago · Modified Jun 17, 20262w ago
2.3 CVSS 4.0
Low
Find Similar
Published Apr 9, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
2.3
Exploitability
—
Impact
—
Vector string
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

Threat Intelligence

EPSS Exploit Probability
10.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

Affected Products 1

VendorProductVersionRange
lycheeorglychee* <7.5.4

References 3

  • github.com https://github.com/LycheeOrg/Lychee/commit/76a3f0513eca6458bf7f8c337c1ad65e59b22bcb
    Patch
  • github.com https://github.com/LycheeOrg/Lychee/pull/4264
    Issue TrackingPatch
  • github.com https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-4v4c-g2jv-4g25
    ExploitPatchVendor Advisory

Remediation

  • github.com https://github.com/LycheeOrg/Lychee/commit/76a3f0513eca6458bf7f8c337c1ad65e59b22bcb
    Patch
  • github.com https://github.com/LycheeOrg/Lychee/pull/4264
    Issue TrackingPatch
  • github.com https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-4v4c-g2jv-4g25
    ExploitPatchVendor Advisory