CVE-2026-33537 | THREATINT

Description

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.

PUBLISHED Reserved 2026-03-20 | Published 2026-03-26 | Updated 2026-03-27 | Assigner GitHub_M

MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

Problem types

CWE-918: Server-Side Request Forgery (SSRF)

Product status

< 7.5.1

affected

References

github.com/...Lychee/security/advisories/GHSA-vq6w-prpf-h287

github.com/...ommit/41386677681d18cd04e42a35b50bd88bf53a4a6a

cve.org (CVE-2026-33537)

nvd.nist.gov (CVE-2026-33537)

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