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Back to active CVEs
High · CVSS 8.1CVE-2026-8400

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

Answer in brief

CVE-2026-8400 records a High severity (CVSS 8.1) vulnerability in Multiple Vulnerabilities in IBM® Java SDK affect IBM WebSphere Application Server and WebSphere Application Server Liberty due to the July 2026 CPU. The current sources do not mark it as known exploited. The current feed maps IBM/WebSphere Application Server (generic), IBM/WebSphere Application Server - Liberty (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 5, 2026Updated Aug 10, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Aug 10, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.1
Exploitation
Not marked as known exploited
Affected software
5 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/WebSphere Application Server (generic), IBM/WebSphere Application Server - Liberty (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:ibm:websphere_application_server:8.5.0.0:*:*:*:-:*:*:*Not reportedNot reported
cpe:2.3:a:ibm:websphere_application_server:9.0.0.0:*:*:*:-:*:*:*Not reportedNot reported
cpe:2.3:a:ibm:websphere_application_server:-:*:*:*:liberty:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
IBM/WebSphere Application Servergeneric8.5 || 9.0Not reported
IBM/WebSphere Application Server - LibertygenericContinuous deliveryNot reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for IBM/WebSphere Application Server, IBM/WebSphere Application Server - Liberty.
  2. 2Review the reported fix. Source-reported 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.

Evidence timeline and material changes

  1. Published upstream

    Aug 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referenceibm.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-470
Source
CVE List V5
Source checked
Nov 4, 2026
References
1 linked source
Open source record