Bug 2572634 (CVE-2026-127141)

Summary:	CVE-2026-127141 sogo: sogo: Denial of Service via unresponsive auxiliary IMAP server
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability-draft	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in SOGo. An authenticated remote attacker can cause a Denial of Service (DoS) by configuring an auxiliary Internet Message Access Protocol (IMAP) account pointing to an unresponsive server that accepts connections but never sends an initial greeting response. By issuing concurrent requests to access this account, the lack of an effective timeout leaves worker processes occupied indefinitely, exhausting available server capacity and denying service to all users.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2026-11-12 16:14:40 UTC

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.