IBM i is Affected By Denial of Service, HTTP Request Smuggling, and Remote Code Execution Vulnerabilities in IBM WebSphere Application Server Liberty [, , , , ]

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Summary

CVECVE-2026-8858
StatePUBLISHED
Assigneribm
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-22 16:16:42 UTC
Updated2026-06-22 17:09:39 UTC
DescriptionIBM i 7.6, 7.5, 7.4, and 7.3, IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted responses to the plug-in.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-94 | CWE-94 CWE-94 Improper Control of Generation of Code ('Code Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA IBM I affected 7.6.0 1.8.4 semver Not specified
CNA IBM I affected 7.5.0 semver Not specified
CNA IBM I affected 7.4.0 semver Not specified
CNA IBM I affected 7.3.0 semver Not specified

References

ReferenceSourceLinkTags
www.ibm.com/support/pages/node/7277344 [email protected] www.ibm.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: IBM strongly recommends addressing the vulnerabilities now. IBM i Release5770-SS1 Option 3 PTF Number(s)PTF Download Link(s)7.6SJ10122 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ10122 7.5SJ10121 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ10121 7.4SJ10120 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ10120 7.3SJ10119 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ10119 IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.

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