CVE-2026-33644— Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-33644
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Lychee 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lychee是The Lychee Organisation开源的一个漂亮且易于使用的照片管理系统。用于管理和共享照片。 Lychee 7.5.2之前版本存在代码问题漏洞，该漏洞源于SSRF保护可使用DNS重绑定绕过，可能导致服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-33644
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-33644
请登录查看更多情报信息。
Same Patch Batch · LycheeOrg · 2026-03-26 · 3 CVEs total
| CVE-2026-33537 | Lychee has SSRF bypass via incomplete IP validation in Photo::fromUrl — loopback and link- | |
| CVE-2026-33738 | Lychee Vulnerable to Stored XSS via Photo Description in RSS/Atom/JSON Feed (No Sanitizati |
IV. Related Vulnerabilities
Same product: Lychee
- CVE-2026-39957
Lychee has Broken Access Control in SharingController::listA - CVE-2026-33738
Lychee Vulnerable to Stored XSS via Photo Description in RSS - CVE-2026-33537
Lychee has SSRF bypass via incomplete IP validation in Photo - CVE-2026-22784
Lychee cross-album password propagation on Album unlocking - CVE-2025-53018
Lychee has Server-Side Request Forgery (SSRF) in Photo::from
Same vendor: LycheeOrg
- CVE-2026-39957
Lychee has Broken Access Control in SharingController::listA - CVE-2026-33738
Lychee Vulnerable to Stored XSS via Photo Description in RSS - CVE-2026-33537
Lychee has SSRF bypass via incomplete IP validation in Photo - CVE-2026-22784
Lychee cross-album password propagation on Album unlocking - CVE-2025-53018
Lychee has Server-Side Request Forgery (SSRF) in Photo::from
Same weakness: CWE-918
- CVE-2026-8193
Akaunting Invoice PDF Rendering dompdf.php server-side reque - CVE-2026-44313
LinkWarden: Server-Side Request Forgery (SSRF) in Link Creat - CVE-2026-42352
pygeoapi 0.23.x: Unauthenticated SSRF via OGC API - Processe - CVE-2026-42346
Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validatio - CVE-2026-42339
New API: SSRF Filter Bypass via 0.0.0.0
V. Comments for CVE-2026-33644
No comments yet