{"cve":"CVE-2026-58272","nvd":{"published":"2026-09-21T21:17:06.207","modified":"2026-09-30T17:32:07.107","status":"Deferred","description":"Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Versions prior to 2.4.1 contain an observable timing discrepancy in the login endpoint because authentication attempts for nonexistent accounts return without performing the bcrypt comparison used for existing accounts. An unauthenticated attacker can measure response times to enumerate valid usernames or email addresses, facilitating credential-stuffing, password-spraying, and phishing attacks. Version 2.4.1 contains a patch.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-208"],"references":["https://github.com/Sync-in/server/security/advisories/GHSA-29hq-23m2-2j47","https://github.com/Sync-in/server/security/advisories/GHSA-29hq-23m2-2j47"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-58272","score":0.00394,"percentile":0.33264,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-29hq-23m2-2j47","url":"https://osv.dev/vulnerability/GHSA-29hq-23m2-2j47","summary":"Sync-in Server has Username/Login Enumeration via Timing Side-Channel on POST /api/auth/login (incomplete fix of the prior timing-attack advisory)","modified":"2026-09-22T15:00:48.902276260Z","packages":[{"ecosystem":"npm","name":"@sync-in/server","purl":"pkg:npm/%40sync-in/server","ranges":["<2.4.1"],"fixed":["2.4.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}