IBM WebSphere eXtremes Scale is affected by uncontrolled resource consumption when XDF is enabled

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Summary

CVECVE-2026-9002
StatePUBLISHED
Assigneribm
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-30 20:17:32 UTC
Updated2026-07-02 19:59:28 UTC
DescriptionIBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 could allow an adjacent attacker to cause a denial of service due to improper validation in the XDF decoder. The application processes deeply nested Protocol Buffers messages and attacker-controlled length prefixes without sufficient bounds checking, which may allow an attacker on the same network to trigger a StackOverflowError or OutOfMemoryError, resulting in a crash of the WebSphere Application Server JVM.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.002690000 probability, percentile 0.185220000 (date 2026-07-03)

Problem Types: CWE-400 | NVD-CWE-noinfo | CWE-400 CWE-400 Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ibm Websphere Extreme Scale All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA IBM WebSphere Extreme Scale affected 8.6.1.0 8.6.1.6 semver Not specified

References

ReferenceSourceLinkTags
www.ibm.com/support/pages/node/7278346 [email protected] www.ibm.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: ProductVersion(s)APARRemediation/First FixIBM WebSphere eXtreme Scale8.6.1.0 - 8.6.1.6PH71946  For older versions, upgrade to latest fixpack 8.6.1.6 and then apply the PH71946 iFix. If you are using 8.6.1.6  directly apply the PH71946 iFix. Recommended Fixes page for WebSphere eXtreme Scale http://www.ibm.com/support/docview.wss

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