CVE-2026-127111

HIGH 7.4

SOGo before 5.12.13 Unauthenticated Password Recovery Brute Force

CVSS Score

7.4

EPSS Score

0.0%

EPSS Percentile

0th

SOGo before 5.12.13 contains an improper restriction of excessive authentication attempts vulnerability that allows unauthenticated attackers to reset account passwords by repeatedly guessing secret-question answers via the passwordRecoveryCheck endpoint without lockout or rate limiting. Attackers can submit unlimited candidate answers to obtain a valid recovery JWT, then use it to change the account password without the old credential and log in via the connect endpoint, achieving full account takeover on accounts without TOTP enabled.

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

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.13 vulncheck.com: https://www.vulncheck.com/advisories/sogo-before-unauthenticated-password-recovery-brute-force

Credits

Richard Olszynský