CVE-2026-8400 (GCVE-0-2026-8400)

Vulnerability from cvelistv5 – Published: 2026-08-05 15:58 – Updated: 2026-08-06 03:55
VLAI
Title
Multiple Vulnerabilities in IBM® Java SDK affect IBM WebSphere Application Server and WebSphere Application Server Liberty due to the July 2026 CPU
Summary
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.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 00:00 UTC
CWE
  • CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Assigner
References
URL Tags
https://www.ibm.com/support/pages/node/7282446 vendor-advisorypatch
Impacted products
Vendor Product Version CPE status
IBM WebSphere Application Server Affected: 8.5
Affected: 9.0
    cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:*
Create a notification for this product.
IBM WebSphere Application Server - Liberty Affected: Continuous delivery
    cpe:2.3:a:ibm:websphere_application_server_liberty:continuous:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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                  "value": "\u003cp\u003e\u003cstrong\u003eFor IBM WebSphere Application Server Liberty:\u003c/strong\u003e\u003c/p\u003e\u003cp\u003eUpgrade to IBM SDK, Java Technology Edition Version 8 SR8 FP70 refer to \u003ca href=\"http://www-01.ibm.com/support/docview.wss?uid=swg27049903\" rel=\"nofollow\"\u003eIBM Java SDKs for Liberty \u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003cstrong\u003eFor Version 9 IBM WebSphere Application Server traditional:\u003c/strong\u003e\u003c/p\u003e\u003cp\u003eUpdate to the IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP70 using the instructions in the IBM Documentation \u003ca href=\"https://www.ibm.com/support/knowledgecenter/en/SSEQTP_9.0.5/com.ibm.websphere.installation.base.doc/ae/tins_installation_jdk.html\" rel=\"nofollow\"\u003eInstalling and updating IBM SDK, Java Technology Edition on distributed environments\u003c/a\u003e then use the IBM Installation Manager to access the \u003ca href=\"https://www.ibm.com/support/knowledgecenter/SSEQTP_9.0.5/com.ibm.websphere.installation.base.doc/ae/cins_repositories.html\" rel=\"nofollow\"\u003eonline product repositories\u003c/a\u003e to install the SDK or use IBM Installation Manager and access the \u003ca href=\"http://www-01.ibm.com/support/docview.wss?uid=swg24042430\" rel=\"nofollow\"\u003epackages from Fixcentral\u003c/a\u003e.\u003c/p\u003e\u003cp\u003e\u003cbr/\u003e\u003cstrong\u003eFor Version 8.5.0.0 through 8.5.5.30 IBM WebSphere Application Server traditional:\u00a0 \u003c/strong\u003e\u003c/p\u003e\u003cp\u003eFor 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:\u003c/p\u003e\u003cp\u003e\u003cbr/\u003eFor IBM SDK Java Technology Edition Version 8\u003c/p\u003e\u003cul\u003e\u003cli\u003eFor 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 \u003ca href=\"https://www.ibm.com/support/pages/node/7281415\" rel=\"nofollow\"\u003eDT496796\u003c/a\u003e: Will upgrade you to IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP70.\u00a0\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 OR\u003c/p\u003e\u003cul\u003e\u003cli\u003eApply IBM Java SDK shipped with IBM WebSphere Application Server Fix pack 31 (8.5.5.31) or later (targeted availability 3Q 2026).\u003c/li\u003e\u003c/ul\u003e\u003cdiv\u003e\u003cstrong\u003eFor Application Client for IBM WebSphere Application Server: \u003c/strong\u003e\u003c/div\u003e\u003cp\u003eFollow instructions above for the IBM WebSphere Application Server to download the interim fix needed for your version of the Application Client.\u003c/p\u003e"
                }
              ],
              "value": "For IBM WebSphere Application Server Liberty:\n\n\n\nUpgrade 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 \n\n\n\nFor Version 9 IBM WebSphere Application Server traditional:\n\n\n\nUpdate 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 .\n\n\n\n\nFor Version 8.5.0.0 through 8.5.5.30 IBM WebSphere Application Server traditional:\u00a0 \n\n\n\nFor 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:\n\n\n\n\nFor IBM SDK Java Technology Edition Version 8\n\n  *  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.\u00a0\n\n\n\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 OR\n\n  *  Apply IBM Java SDK shipped with IBM WebSphere Application Server Fix pack 31 (8.5.5.31) or later (targeted availability 3Q 2026).\n\n\nFor Application Client for IBM WebSphere Application Server: \n\n\n\nFollow instructions above for the IBM WebSphere Application Server to download the interim fix needed for your version of the Application Client."
            }
          ],
          "title": "Multiple Vulnerabilities in IBM\u00ae Java SDK affect IBM WebSphere Application Server and WebSphere Application Server Liberty due to the July 2026 CPU"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "assignerShortName": "ibm",
        "cveId": "CVE-2026-8400",
        "datePublished": "2026-08-05T15:58:42.883Z",
        "dateReserved": "2026-05-12T13:57:37.652Z",
        "dateUpdated": "2026-08-06T03:55:25.879Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.