SB2026080431 - Multiple vulnerabilities in IBM Global High Availability Mailbox

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Main Vulnerability Database SB2026080431

SB2026080431 - Multiple vulnerabilities in IBM Global High Availability Mailbox

Published: August 4, 2026

Security Bulletin ID SB2026080431
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Improper access control (CVE-ID: CVE-2026-27314)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to escalate privileges.

The vulnerability exists due to improper access control in ADD IDENTITY authorization handling when associating a certificate identity with an arbitrary role in an mTLS environment using MutualTlsAuthenticator. A remote user can associate their own certificate identity with an arbitrary role to escalate privileges.

Exploitation requires an mTLS environment using MutualTlsAuthenticator and CREATE permission.


2) Resource exhaustion (CVE-ID: CVE-2026-32588)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 5.3 [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]


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to resource consumption in ALTER ROLE password hashing when processing repeated password change requests over CQL. A remote user can issue repeated password change requests to cause a denial of service.


Remediation

Install update from vendor's website.

References