CVE-2026-58272Medium· 5.3▾ TwilightPoC availableSync-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 accou…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 29.2 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 23.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
Exploit / PoC code exists
Last analysed / modified upstream
0.3% → 0.4%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
@sync-in/server <= 2.4.0Patched in:
@sync-in/server 2.4.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-58270Medium· 6.5Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing
CVE-2026-58269High· 8.1Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing
CVE-2026-58271Medium· 6.8Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing
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