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With package: tests.testers.lycheeLinkCheck.ok

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Untriaged

Permalink CVE-2026-33644

created 1 month ago Activity log

Created suggestion 1 month ago

Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs

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.

References

https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5245-4p8c-jwff x_refsource_CONFIRM
https://github.com/LycheeOrg/Lychee/commit/28c5261fb9deab4f9420c8cc2f73a87425939107 x_refsource_MISC

Affected products

Lychee

==< 7.5.2

Matching in nixpkgs

pkgs.lychee

Fast, async, stream-based link checker written in Rust

nixos-unstable 0.23.0
- nixpkgs-unstable 0.23.0
- nixos-unstable-small 0.23.0
nixos-25.11 0.21.0
- nixos-25.11-small 0.21.0
- nixpkgs-25.11-darwin 0.21.0

pkgs.LycheeSlicer

All-in-one 3D slicer for resin and FDM printers

nixos-unstable 7.6.3
- nixpkgs-unstable 7.6.2
- nixos-unstable-small 7.6.3
nixos-25.11 7.5.0
- nixos-25.11-small 7.5.0
- nixpkgs-25.11-darwin 7.5.0

pkgs.lycheeslicer

All-in-one 3D slicer for resin and FDM printers

nixos-unstable 7.6.3
- nixpkgs-unstable 7.6.2
- nixos-unstable-small 7.6.3

pkgs.tests.testers.lycheeLinkCheck.ok

None

nixos-unstable -
- nixpkgs-unstable
- nixos-unstable-small
nixos-25.11 -
- nixos-25.11-small
- nixpkgs-25.11-darwin

pkgs.tests.testers.lycheeLinkCheck.network

None

nixos-unstable -
- nixpkgs-unstable
- nixos-unstable-small
nixos-25.11 -
- nixos-25.11-small
- nixpkgs-25.11-darwin

Package maintainers

@Tarinaky Tarinaky
@totoroot Matthias Thym <git@thym.at>
@tuxinaut Denny Schäfer <trash4you@tuxinaut.de>
@ZachDavies Zach Davies <zdmalta@proton.me>

Untriaged

Permalink CVE-2026-33537

created 1 month ago Activity log

Created suggestion 1 month ago

Lychee has SSRF bypass via incomplete IP validation in Photo::fromUrl — loopback and link-local IPs not blocked

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.