{"id":"CVE-2026-57569","state":"PUBLISHED","title":"Lychee: Distinct post-fix SSRF variant in Photo::fromUrl due to missing IP pinning after DNS-based validation","description":"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.","publishedAt":"2026-10-15T16:24:34.652Z","updatedAt":"2026-10-15T17:58:10.062Z","severity":{"score":2.3,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["LycheeOrg Lychee"],"affected":[{"vendor":"LycheeOrg","product":"Lychee","versions":[{"version":"< 7.6.0","status":"affected"}]}],"references":["https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vj35-v9x5-vrxh","https://github.com/LycheeOrg/Lychee/pull/4344","https://github.com/LycheeOrg/Lychee/commit/a5f23e314f1a933d31aa650616bf9cd84bd0407e","https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.0"],"weaknesses":["CWE-367","CWE-918"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/57xxx/CVE-2026-57569.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57569","state":"PUBLISHED","datePublished":"2026-10-15T16:24:34.652Z","dateUpdated":"2026-10-15T17:58:10.062Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-24T18:49:56.207Z"},"containers":{"cna":{"title":"Lychee: Distinct post-fix SSRF variant in Photo::fromUrl due to missing IP pinning after DNS-based validation","descriptions":[{"lang":"en","value":"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":[{"vendor":"LycheeOrg","product":"Lychee","versions":[{"version":"< 7.6.0","status":"affected"}]}],"references":[{"url":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vj35-v9x5-vrxh","name":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vj35-v9x5-vrxh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/LycheeOrg/Lychee/pull/4344","name":"https://github.com/LycheeOrg/Lychee/pull/4344","tags":["x_refsource_MISC"]},{"url":"https://github.com/LycheeOrg/Lychee/commit/a5f23e314f1a933d31aa650616bf9cd84bd0407e","name":"https://github.com/LycheeOrg/Lychee/commit/a5f23e314f1a933d31aa650616bf9cd84bd0407e","tags":["x_refsource_MISC"]},{"url":"https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.0","name":"https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","subAvailabilityImpact":"LOW","baseScore":2.3,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-367","lang":"en","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-15T16:24:34.652Z"},"source":{"advisory":"GHSA-vj35-v9x5-vrxh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vj35-v9x5-vrxh","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-15T17:57:45.409797Z","id":"CVE-2026-57569","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-15T17:58:10.062Z"}}]}}}