PH71590:IBM WEBSPHERE APPLICATION SERVER IS VULNERABLE TO IDENTITY SPOOFING (CVE-2026-8644)

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Abstract

IBM WEBSPHERE APPLICATION SERVER IS VULNERABLE TO IDENTITY SPOOFING (CVE-2026-8644)

Download Description

The fix for this APAR is targeted for inclusion in 8.5.5.30 and 9.0.5.29.

For more information, see: Recommended Updates for WebSphere Application Server

Download Package

IMPORTANT NOTE:	WebSphere Application Server and Liberty fix access requires S&S Entitlement beginning in 2021. Use properly registered IDs to download the fixes in this table. Signature file is provided along with interim fix. See Verifying WebSphere Application Server release packages and Verifying Liberty release packages.

IBM Installation Manager packages

DOWNLOAD	APPLICABLE FIX PACKS	RELEASE DATE	URL
9.0.5.28-WS-WAS-IFPH71590	9.0.5.28	16 Jun 2026	FC
9.0.5.27-WS-WAS-IFPH71590	9.0.5.27	12 Jun 2026	FC
9.0.5.25-WS-WAS-IFPH71590	9.0.5.25 through 9.0.5.26	12 Jun 2026	FC
9.0.5.24-WS-WAS-IFPH71590	9.0.5.24	12 Jun 2026	FC
9.0.5.20-WS-WAS-IFPH71590	9.0.5.20 through 9.0.5.23	12 Jun 2026	FC
8.5.5.28-WS-WAS-IFPH71590	8.5.5.28 through 8.5.5.29	12 Jun 2026	FC
8.5.5.25-WS-WAS-IFPH71590	8.5.5.25 through 8.5.5.27	12 Jun 2026	FC

Note: FC stands for Fix Central. Review the What is Fix Central (FC)? FAQs for more details.

Problems Solved

PH71590, PH71422, PH58798, PH58869, PH59304, PH59438, PH61068, PH61808, PH62052, PH63778, PH64005, PH65121, PH65161, PH65873

Change History

2026/06/01: Correct description of range for 9.0.5.24-WS-WAS-IFPH71422
2026/06/12: There might be a performance impact caused by the fix for PH71422. The fixes for PH71422 are replaced by PH71590.
2026/06/16: Add IFPH71590 for 9.0.5.28

Technical Support

Contact IBM Support at https://www.ibm.com/mysupport/ or 1-800-IBM-SERV (US only).

Document Location

Worldwide

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Problems (APARS) fixed
PH71422, PH58798, PH58869, PH59304, PH59438, PH61068, PH61808, PH62052, PH63778, PH64005, PH65121, PH65161, PH65873

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