{"id":"CVE-2026-47684","summary":"Sync-in Server: SSRF protection bypass via IPv4-mapped IPv6 addresses in regExpPrivateIP","details":"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.","aliases":["GHSA-q4x5-8cj6-52wg"],"modified":"2026-08-12T03:51:36.947717395Z","published":"2026-06-16T14:31:30.807Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47684.json"},"references":[{"type":"WEB","url":"https://github.com/Sync-in/server/releases/tag/v2.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47684.json"},{"type":"ADVISORY","url":"https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47684"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sync-in/server","events":[{"introduced":"0"},{"fixed":"e902f7ca264f08329bf976abcacafc7403ae6a37"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.3.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v2.2.1","v2.2.0","v2.1.0","v2.0.0","v1.11.0","v1.10.1","v1.10.0","v1.9.6","v1.9.5","v1.9.4","v1.9.3","v1.9.2","v1.9.1","v1.9.0","v1.8.1","v1.8.0","v1.7.0","v1.6.1","v1.6.0","v1.5.2","v1.5.1","v1.5.0","v1.4.0","v1.3.9","v1.3.8","v1.3.7","v1.3.6","v1.3.5","v1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.2","v1.2.1","v1.2.0","v1.1.1","v1.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47684.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"}]}