{"id":"CVE-2026-47684","aliases":["GHSA-q4x5-8cj6-52wg"],"url":"https://o3.security/vulnerability/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.","published":"2026-06-16T14:31:30.807Z","modified":"2026-08-12T03:51:36.947717395Z","cvss":{"score":7.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},"epss":{"score":0.00222,"percentile":0.12835,"asOf":"2026-08-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@sync-in/server","fixedVersion":"2.3.0"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:36.947717395Z"}}