SB2026072702 - Red Hat Enterprise Linux 8 update for dovecot
Published: July 27, 2026
Security Bulletin ID
SB2026072702
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2026-42006)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in imap-login when processing excessive bracing over IMAP. A remote user can send excessive bracing to cause a denial of service.
The issue remained reachable because an earlier fix blocked closing braces, but open braces could still bypass the limit.
Remediation
Install update from vendor's website.