CVE-2026-57569
Severity not reportedLychee is a free, open-source photo-management tool.
Lychee is a free, open-source photo-management tool. Prior to 7.6.0, the POST /api/v2/Photo::fromUrl flow validates a hostname and its resolved addresses in app/Rules/PhotoUrlRule.php but later passes the original hostname through app/Actions/Import/FromUrl.php to app/Image/Files/DownloadedFile.php for a separate fopen connection. An authenticated attacker who controls DNS responses can cause validation to observe a public address and the subsequent fetch to resolve the same hostname to a private or otherwise forbidden address. This DNS rebinding time-of-check to time-of-use mismatch bypasses the intended server-side request forgery protections and can reach services available from the Lychee server, subject to deployment and TLS behavior. This issue is fixed in version 7.6.0.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/LycheeOrg/Lychee/commit/a5f23e314f1a933d31aa650616bf9cd84bd0407e security-advisories@github.com
- https://github.com/LycheeOrg/Lychee/pull/4344 security-advisories@github.com
- https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.0 security-advisories@github.com
- https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vj35-v9x5-vrxh security-advisories@github.com
- https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vj35-v9x5-vrxh 134c704f-9b21-4f2e-91b3-4a467353bcc0