CVE-2026-127131
SOGo before 5.12.13 Missing Rate Limiting on TOTP Verification
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
0th
SOGo before 5.12.13 contains a missing rate limiting vulnerability in its web login TOTP verification that allows attackers who already possess a victim's password to brute-force the second-factor code without triggering any lockout. Attackers can send repeated POST requests to /SOGo/connect with wrong verification codes at high speed since failed TOTP attempts never increment the failed-login counter and SOGoMaximumFailedLoginCount does not apply, enabling indefinite guessing across 30-second code windows to bypass two-factor authentication.
| CWE | CWE-307 |
| Vendor | alinto |
| Product | sogo |
| Published | Nov 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Alinto / sogo
0 < 5.12.13
References
Credits
Richard Olszynský