CVE-2026-58272 Sync-in Server has Username/Login Enumeration via Timing Side-Channel on POST /api/auth/login (incomplete fix of the prior timing-attack advisory)

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...

CVE-2026-58270

Sync-in Server , an open-source platform for file storage, sharing, and syncing, is vulnerable to a ReDoS (Regular Expression Denial of Service) in the sync diff pathFilters parameter prior to version 2.4.0 . The endpoint compiles a user-supplied string directly into a RegExp without complexity v...

CVE-2026-58270 Sync-in Server has a ReDoS via Unsanitized Regex in Sync Diff `pathFilters`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, the sync diff endpoint compiles a user-supplied string into a RegExp with no complexity validation. A catastrophic-backtracking pattern e.g. ^a++b blocks the Node.js event loop...

CVE-2026-58270 Sync-in Server has a ReDoS via Unsanitized Regex in Sync Diff `pathFilters`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, the sync diff endpoint compiles a user-supplied string into a RegExp with no complexity validation. A catastrophic-backtracking pattern e.g. ^a++b blocks the Node.js event loop...

CVE-2026-58270 Sync-in Server has a ReDoS via Unsanitized Regex in Sync Diff `pathFilters`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, the sync diff endpoint compiles a user-supplied string into a RegExp with no complexity validation. A catastrophic-backtracking pattern e.g. ^a++b blocks the Node.js event loop...

CVE-2026-58269

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/auth/token authenticates with username and password only, then calls getTokens, which returns full access and refresh JWTs without checking whether the account has TO...

CVE-2026-58271

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/app/sync/register accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, SyncClientsManager.register calls updateAccessesuser, ip,...

CVE-2026-58269 Sync-in Server has a complete 2FA Bypass via `POST /api/auth/token`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/auth/token authenticates with username and password only, then calls getTokens, which returns full access and refresh JWTs without checking whether the account has TO...

CVE-2026-58269 Sync-in Server has a complete 2FA Bypass via `POST /api/auth/token`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/auth/token authenticates with username and password only, then calls getTokens, which returns full access and refresh JWTs without checking whether the account has TO...

CVE-2026-58269

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0 , the POST /api/auth/token endpoint authenticates users with only username and password, then calls getTokens(), which returns full access and refresh JWTs without checking whet...

CVE-2026-58269 Sync-in Server has a complete 2FA Bypass via `POST /api/auth/token`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/auth/token authenticates with username and password only, then calls getTokens, which returns full access and refresh JWTs without checking whether the account has TO...

CVE-2026-58271

Sync-in Server , an open-source platform for file storage and collaboration, is vulnerable to TOTP brute-force in versions prior to 2.4.0 . The endpoint POST /api/app/sync/register fails to increment the passwordAttempts counter on TOTP failure due to a freeze branch in updateAccesses(), so the l...

CVE-2026-58271 @sync-in/server vulnerable to TOTP Brute-Force via `POST /api/app/sync/register`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/app/sync/register accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, SyncClientsManager.register calls updateAccessesuser, ip,...

CVE-2026-58271 @sync-in/server vulnerable to TOTP Brute-Force via `POST /api/app/sync/register`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/app/sync/register accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, SyncClientsManager.register calls updateAccessesuser, ip,...

CVE-2026-58271 @sync-in/server vulnerable to TOTP Brute-Force via `POST /api/app/sync/register`

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/app/sync/register accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, SyncClientsManager.register calls updateAccessesuser, ip,...

CVE-2026-58270: Inefficient Regular Expression Complexity

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, the sync diff endpoint compiles a user-supplied string into a RegExp with no complexity validation. A catastrophic-backtracking pattern e.g. ^a++b blocks the Node.js event loop...

CVE-2026-58271: Improper Restriction of Excessive Authentication Attempts

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/app/sync/register accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, SyncClientsManager.register calls updateAccessesuser, ip,...

CVE-2026-58272: Observable Timing Discrepancy

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...

PT-2026-96240

Name of the Vulnerable Software and Affected Versions Sync-in Server versions prior to 2.4.0 Description An issue exists where the POST /api/auth/token endpoint authenticates users using only a username and password, subsequently calling the getTokens function to return full access and refresh JS...

CVE-2026-58269: Authentication Bypass Using an Alternate Path or Channel

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, POST /api/auth/token authenticates with username and password only, then calls getTokens, which returns full access and refresh JWTs without checking whether the account has TO...