CVE-2026-33537
March 26, 2026
Lychee is a free, open-source photo-management tool. The patch introduced for GHSA-cpgw-wgf3-xc6v (SSRF via "Photo::fromUrl") contains an incomplete IP validation check that fails to block loopback addresses and link-local addresses. Prior to version 7.5.1, an authenticated user can still reach internal services using direct IP addresses, bypassing all four protection configuration settings even when they are set to their secure defaults. Version 7.5.1 contains a fix for the issue.
Affected Packages
https://github.com/LycheeOrg/Lychee.git (GITHUB):
Affected version(s) >=v4.0.0-alpha.1 <v7.5.1Fix Suggestion:
Update to version v7.5.1https://github.com/LycheeOrg/Lychee.git (GITHUB):
Affected version(s) >=v4.0.0-alpha.1 <v7.5.1Fix Suggestion:
Update to version v7.5.1https://github.com/LycheeOrg/Lychee.git (GITHUB):
Affected version(s) >=v4.0.0-alpha.1 <v7.5.1Fix Suggestion:
Update to version v7.5.1https://github.com/LycheeOrg/Lychee.git (GITHUB):
Affected version(s) >=v4.0.0-alpha.1 <v7.5.1Fix Suggestion:
Update to version v7.5.1https://github.com/LycheeOrg/Lychee.git (GITHUB):
Affected version(s) >=v4.0.0-alpha.1 <v7.5.1Fix Suggestion:
Update to version v7.5.1https://github.com/LycheeOrg/Lychee.git (GITHUB):
Affected version(s) >=v4.0.0-alpha.1 <v7.5.1Fix Suggestion:
Update to version v7.5.1Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.04
