{"id":"CVE-2026-47684","state":"PUBLISHED","title":"Sync-in Server: SSRF protection bypass via IPv4-mapped IPv6 addresses in regExpPrivateIP","description":"Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.3.0, the private IP blocklist regex used in the URL download feature does not match IPv4-mapped IPv6 addresses (e.g. ::ffff:127.0.0.1), allowing SSRF protection to be bypassed on dual-stack systems. Version 2.3.0 fixes the issue.","publishedAt":"2026-06-16T14:31:30.807Z","updatedAt":"2026-06-16T17:10:12.548Z","severity":{"score":7.7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["Sync-in server"],"affected":[{"vendor":"Sync-in","product":"server","versions":[{"version":"< 2.3.0","status":"affected"}]}],"references":["https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg","https://github.com/Sync-in/server/releases/tag/v2.3.0"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/47xxx/CVE-2026-47684.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-47684","state":"PUBLISHED","datePublished":"2026-06-16T14:31:30.807Z","dateUpdated":"2026-06-16T17:10:12.548Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-19T21:18:20.402Z"},"containers":{"cna":{"title":"Sync-in Server: SSRF protection bypass via IPv4-mapped IPv6 addresses in regExpPrivateIP","descriptions":[{"lang":"en","value":"Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.3.0, the private IP blocklist regex used in the URL download feature does not match IPv4-mapped IPv6 addresses (e.g. ::ffff:127.0.0.1), allowing SSRF protection to be bypassed on dual-stack systems. Version 2.3.0 fixes the issue."}],"affected":[{"vendor":"Sync-in","product":"server","versions":[{"version":"< 2.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg","name":"https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/Sync-in/server/releases/tag/v2.3.0","name":"https://github.com/Sync-in/server/releases/tag/v2.3.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"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":"2026-06-16T14:31:30.807Z"},"source":{"advisory":"GHSA-q4x5-8cj6-52wg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T17:01:38.857420Z","id":"CVE-2026-47684","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":"2026-06-16T17:10:12.548Z"}}]}}}