CVE-2026-127141

SOGo before 5.12.13 Denial of Service via Auxiliary IMAP Account Greeting Wait

Published Nov 12, 2026 CVSS 4.0 · 7.1 High EPSS n/a KEV · Not listed
Description
SOGo before 5.12.13 contains a denial of service vulnerability that allows authenticated attackers to exhaust all worker processes by configuring an auxiliary IMAP mail account pointing to a controlled host that accepts a TCP connection but never sends an IMAP greeting response. Attackers can issue concurrent GET requests to the mail view of this account to hold workers indefinitely without an effective timeout, occupying every SOGo worker and denying service to all users for approximately five minutes until the watchdog kills and respawns the stuck workers.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Alinto
Alinto sogo
Vendors & Products Alinto
Alinto sogo
Type Values Removed Values Added
Description SOGo before 5.12.13 contains a denial of service vulnerability that allows authenticated attackers to exhaust all worker processes by configuring an auxiliary IMAP mail account pointing to a controlled host that accepts a TCP connection but never sends an IMAP greeting response. Attackers can issue concurrent GET requests to the mail view of this account to hold workers indefinitely without an effective timeout, occupying every SOGo worker and denying service to all users for approximately five minutes until the watchdog kills and respawns the stuck workers.
Title SOGo before 5.12.13 Denial of Service via Auxiliary IMAP Account Greeting Wait
Weaknesses CWE-1088
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 12, 2026, 5:17 PM
Reserved
Nov 12, 2026, 3:47 PM
Status
Deferred
Published
Nov 12, 2026, 4:19 PM
Modified
Nov 12, 2026, 6:17 PM