CVE-2026-57569 (GCVE-0-2026-57569)
Vulnerability from cvelistv5 – Published: 2026-10-15 16:24 – Updated: 2026-10-15 17:58
VLAI
EPSS
VEX
Title
Lychee: Distinct post-fix SSRF variant in Photo::fromUrl due to missing IP pinning after DNS-based validation
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 17:57 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/LycheeOrg/Lychee/security/advi… | x_refsource_CONFIRM |
| https://github.com/LycheeOrg/Lychee/pull/4344 | x_refsource_MISC |
| https://github.com/LycheeOrg/Lychee/commit/a5f23e… | x_refsource_MISC |
| https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.0 | x_refsource_MISC |
Impacted products
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"title": "Lychee: Distinct post-fix SSRF variant in Photo::fromUrl due to missing IP pinning after DNS-based validation"
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"lastModified": "2026-10-15T21:08:49.703",
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