Lychee up to 7.5.1 Domain Name PhotoUrlRule.php filter_var host server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Lychee up to 7.5.1. This issue affects the function filter_var of the file PhotoUrlRule.php of the component Domain Name Handler. The manipulation of the argument host leads to server-side request forgery. This vulnerability is listed as CVE-2026-33644. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Lychee up to 7.5.1. It has been rated as critical. This issue affects the function filter_var of the file PhotoUrlRule.php of the component Domain Name Handler. The manipulation of the argument host with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-33644 since 03/23/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available.

By approaching the search of inurl:PhotoUrlRule.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 7.5.2 eliminates this vulnerability. Applying the patch 28c5261fb9deab4f9420c8cc2f73a87425939107 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Lychee 7.5.2
Patch: 28c5261fb9deab4f9420c8cc2f73a87425939107

Timelineinfo

03/23/2026 CVE reserved
03/26/2026 +3 days Advisory disclosed
03/26/2026 +0 days VulDB entry created
03/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-5245-4p8c-jwff
Status: Confirmed

CVE: CVE-2026-33644 (🔒)
GCVE (CVE): GCVE-0-2026-33644
GCVE (VulDB): GCVE-100-353753

Entryinfo

Created: 03/26/2026 23:12
Changes: 03/26/2026 23:12 (72)
Complete: 🔍
Cache ID: 216:BE1:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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