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www.ibm.com • October 15, 2026

There are vulnerabilities in the Apache MyFace library that affects IBM WebSphere Application Server and WebSphere Application Server Liberty.

Vulnerability Details

CVEID: CVE-2026-76646 DESCRIPTION: A remote attacker could cause excessive resource consumption by supplying specially crafted request parameters, potentially resulting in a denial of service condition. Older unsupported versions may also be affected. Users are recommended to upgrade to versions 2.3.12, 2.3- -M9, 3.0.4, 4.0.4, or 4.1.4, which fix this issue. CWE: CWE-400: Uncontrolled Resource Consumption CVSS Source: CISA ADP CVSS Base score: 7.5 CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVEID: CVE-2026-68536 DESCRIPTION: Server-Side Request Forgery / Local File Inclusion in Apache MyFace Core. Older unsupported versions may also be affected. Users are recommended to upgrade to versions 2.3.12, 2.3- -M9, 3.0.4, 4.0.4, or 4.1.4, which fix this issue. CWE: CWE-918: Server-Side Request Forgery (SSRF) CVSS Source: CISA ADP CVSS Base score: 9.8 CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s) Version(s) WebSphere Application Server - Liberty 17.0.0.3 - 26.0.0.10 WebSphere Application Server 8.5 WebSphere Application Server 9.0

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR DT503153 or DT503156. To determine if a feature is enabled for WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature . For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.10: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves DT503153 --OR-- · Apply Fix Pack 26.0.0.11 or later (targeted availability 4Q2026). For IBM WebSphere Application Server traditional: For V9.0.0.0 through 9.0.5.29: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves DT503156 --OR-- · Apply Fix Pack 9.0.5.30 or later (targeted availability 4Q2026). For V8.5.0.0 through 8.5.5.31: · Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix that resolves DT503156 --OR-- · Apply Fix Pack 8.5.5.32 or later (targeted availability 4Q2026). Additional interim fixes may be available and linked off the interim fix download page.

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR DT503153 or DT503156. To determine if a feature is enabled for WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature .

For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.10:

· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves DT503153 --OR-- · Apply Fix Pack 26.0.0.11 or later (targeted availability 4Q2026).

For IBM WebSphere Application Server traditional:

For V9.0.0.0 through 9.0.5.29: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves DT503156 --OR-- · Apply Fix Pack 9.0.5.30 or later (targeted availability 4Q2026).

For V8.5.0.0 through 8.5.5.31: · Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix that resolves DT503156 --OR-- · Apply Fix Pack 8.5.5.32 or later (targeted availability 4Q2026).

Additional interim fixes may be available and linked off the interim fix download page.

Workarounds and Mitigations

Get Notified Future Security Bulletins

Complete CVSS v3 Guide On-line Calculator v3

To determine if a feature is enabled for WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature .

13 Oct 2026: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

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Modified date: 13 October 2026

Initial Publish date: 13 October 2026