SB2026100833 - IBM PowerVC update for Netty

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Main Vulnerability Database SB2026100833

SB2026100833 - IBM PowerVC update for Netty

Published: October 8, 2026

Security Bulletin ID SB2026100833
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper validation of certificate with host mismatch (CVE-ID: CVE-2026-62243)

CWE-ID: CWE-297 - Improper Validation of Certificate with Host Mismatch

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to bypass TLS hostname verification and disclose sensitive information.

The vulnerability exists due to improper validation of certificate with host mismatch in the OpenSSL client path when using a plain X509TrustManager and trust-manager wrapping is unavailable. A remote attacker can present a certificate for a mismatched hostname to bypass TLS hostname verification and disclose sensitive information.

This affects the SslProvider.OPENSSL path on Java 25+ when Unsafe-based reflection is unavailable and a non-extended X509TrustManager is used.


Remediation

Install update from vendor's website.

References