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TI-2026-26025 Aliases CVE-2026-33644

Server-side request forgery in LycheeOrg Lychee

Priority LOW 12CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in `PhotoUrlRule.php` can be bypassed using DNS rebinding. The IP validation check (line 86-89) only activates when the hostname is an IP address. When a domain name is used, `filter_var($host, FILTER_VALIDATE_IP)` returns `false`, skipping the entire check. Version 7.5.2 patches the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00239 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Lychee (LycheeOrg): 7.5.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LycheeOrgLycheebefore 7.5.27.5.2Patch availableCNA
  • Lychee VendorLycheeOrg Affected before 7.5.2 Fixed in 7.5.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:*before 7.5.2VulnerableLycheeOrg
  • cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:* Versions before 7.5.2 Vulnerable ·LycheeOrg

Remediation

  • Fix · CNA Lychee (LycheeOrg) Fixed in 7.5.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33644

References

Exploit 1

Patch 1

  • TI-2024-16953 Cross-site Request Forgery (CSRF) vulnerability in Lychee version 3.1.6, allows remote… CVSS 3.1HIGH 8.3
  • TI-2024-16952 Cross Site Scripting (XSS) vulnerability in Lychee 3.1.6, allows remote attackers to… CVSS 3.1MEDIUM 6.1
  • TI-2026-25930 Lychee has SSRF bypass via incomplete IP validation in Photo::fromUrl — loopback and link-local IPs not blocked CVSS 4.0MEDIUM 5.3
  • TI-2026-26117 Lychee Vulnerable to Stored XSS via Photo Description in RSS/Atom/JSON Feed (No Sanitization on Public Endpoint) CVSS 4.0MEDIUM 4.8
  • TI-2026-28813 Incorrect authorization in LycheeOrg Lychee CVSS 4.0LOW 2.3
  • TI-2023-28525 Lychee is vulnerable to an SQL Injection in explain DB queries. CVSS 3.1CRITICAL 9.8
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences