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IBM's security bulletin and reports from Tenable and HKCERT confirm the CVE-2026-10842 high-severity bypass flaw in WebSphere Application Server 8.5/9.0 and Liberty versions up to 26.0.0.7.

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Home/Tech/IBM WebSphere 8.5, 9.0 and Liberty Hit by CVE-2026-10842
VERIFIEDBy Xavier Rivera· ·1.5 min read

IBM WebSphere 8.5, 9.0 and Liberty Hit by CVE-2026-10842

IBM disclosed CVE-2026-10842, a high-severity vulnerability with CVSS 7.5 that could let remote attackers bypass security constraints in WebSphere Application Server 8.5, 9.0, and Liberty 17.0.0.3 through 26.0.0.7. The flaw, classified as Authentication Bypass by Alternate Name, was published to the NVD on July 30, 2026.

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IBM WebSphere 8.5, 9.0 and Liberty Hit by CVE-2026-10842
TL;DRAI · 60 sec read

IBM disclosed CVE-2026-10842 in WebSphere Application Server 8.5, 9.0 and Liberty versions 17.0.0.3 through 26.0.0.7. The flaw carries a CVSS score of 7.5 and lets remote attackers bypass security constraints to expose confidential data. Organizations running affected versions should review the IBM support document for remediation.

IBM has disclosed a high-severity vulnerability in multiple versions of its WebSphere Application Server that could allow a remote attacker to bypass security constraints.

The vulnerability carries a CVSS score of 7.5. The flaw, tracked as CVE-2026-10842, affects IBM WebSphere Application Server 8.5 and 9.0 as well as IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.7 in both Traditional and Liberty editions. IBM Corporation provided the CVSS 3.1 vector string AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, resulting in the base score of 7.5 classified as HIGH.
The description states that a remote attacker could exploit the vulnerability to bypass security constraints, potentially exposing confidential data given the high confidentiality impact.

The issue is categorized under CWE-289, described as Authentication Bypass by Alternate Name.

IBM published an official support document for the vulnerability. The record was received from IBM Corporation and added to the NVD dataset on July 30, 2026. A reference link points to https://www.ibm.com/support/pages/node/7280131 for additional details on the flaw and potential remediation steps.
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The CVE record was published to the CVE List on the same day it was added to the NVD. No CVSS 4.0 or CVSS 2.0 assessment has been provided by NIST at this time.
Organizations running the listed versions of WebSphere Application Server should consult the IBM support page immediately.

Affected product versions are explicitly listed in the disclosure. WebSphere Application Server versions 8.5 and 9.0 are marked as affected. For the Liberty edition, versions from 17.0.0.3 up to and including 26.0.0.7 are impacted. The description states that a remote attacker could exploit the vulnerability to bypass security constraints, potentially exposing confidential data given the high confidentiality impact.
Organizations running the listed versions of WebSphere Application Server should consult the IBM support page immediately. The disclosure marks the first public record for this specific CVE identifier.

EXPERT TAKE

Enterprise teams still running older WebSphere 8.5 and 9.0 instances face immediate exposure; patching or migration to a fixed release should be prioritized given the network-accessible nature of the bypass.

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