CVE WatchSep 21, 2026

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/tok

CVSS

8.1

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 21, 2026 · Last modified: Sep 21, 2026 · CWE-288

EPSS · 30d

Not enough EPSS history yet.

Technical description

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 TOTP 2FA enabled. An attacker with stolen or phished credentials can bypass 2FA in a single request. The parallel login endpoint (`POST /api/auth/login`) correctly enforces 2FA by calling `setCookies(user, res, true)`, which gates on `user.twoFaEnabled`. Version 2.4.0 patches the issue.

Official references

github.comhttps://github.com/Sync-in/server/security/advisories/GHSA-92cr-jxw4-5wjg

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