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CVE-2026-8400Multiple Vulnerabilities in IBM® Java SDK affect IBM WebSphere Application Server and WebSphere Application Server Liberty due to the July 2026 CPU

Description

IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty Continuous delivery has a flaw in the ORB component in IBM SDK, Java Technology Edition, may allow a malicious IIOP server to induce loading and instantation of arbitrary classes.

Timeline

  1. ID reserved

    By ibm

  2. · 3 months later

    Published

  3. · 1 day later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-8400, by who scored it
Scored byCVSSScoreVector
ibmCNA (assigner)3.1High8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.48% · top 58% of all CVEs (14 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.

Affected products

What to do

Solution: For IBM WebSphere Application Server Liberty: Upgrade to IBM SDK, Java Technology Edition Version 8 SR8 FP70 refer to IBM Java SDKs for Liberty http://www-01.ibm.com/support/docview.wss For Version 9 IBM WebSphere Application Server traditional: Update to the IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP70 using the instructions in the IBM Documentation Installing and updating IBM SDK, Java Technology Edition on distributed environments https://www.ibm.com/support/knowledgecenter/en/SSEQTP_9.0.5/com.ibm.websphere.installation.base.doc/ae/tins_installation_jdk.html then use the IBM Installation Manager to access the online product repositories https://www.ibm.com/support/knowledgecenter/SSEQTP_9.0.5/com.ibm.websphere.installation.base.doc/ae/cins_repositories.html to install the SDK or use IBM Installation Manager and access the packages from Fixcentral http://www-01.ibm.com/support/docview.wss . For Version 8.5.0.0 through 8.5.5.30 IBM WebSphere Application Server traditional:  For the IBM SDK, Java Technology Version that you use, upgrade to the minimal fix pack level of IBM WebSphere Application Server as noted in the interim fix below then apply the interim fixes: For IBM SDK Java Technology Edition Version 8 * For environments that have been upgraded to use the new default IBM SDK Version 8 bundled with IBM WebSphere Application Server Fix Pack 8.5.5.11 or later: Apply the interim fix that resolves DT496796 https://www.ibm.com/support/pages/node/7281415 : Will upgrade you to IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP70.         OR * Apply IBM Java SDK shipped with IBM WebSphere Application Server Fix pack 31 (8.5.5.31) or later (targeted availability 3Q 2026). For Application Client for IBM WebSphere Application Server: Follow instructions above for the IBM WebSphere Application Server to download the interim fix needed for your version of the Application Client.

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .