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 (v2.0.3)
CWE
  • CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Assigner
ibm
References
URL Tags
https://www.ibm.com/support/pages/node/7282446 vendor-advisorypatch
Impacted products
Vendor Product Version
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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      "source": "Red Hat CSAF VEX",
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      "title": "java-1.8.0-ibm: Arbitrary class loading and instantiation via malicious IIOP server",
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\\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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"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\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.ibm.com/support/pages/node/7282446\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIBM 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.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-470\", \"description\": \"CWE-470 Use of Externally-Controlled Input to Select Classes or Code (\u0027Unsafe Reflection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"shortName\": \"ibm\", \"dateUpdated\": \"2026-08-05T15:58:42.883Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-8400\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-06T03:55:25.879Z\", \"dateReserved\": \"2026-05-12T13:57:37.652Z\", \"assignerOrgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"datePublished\": \"2026-08-05T15:58:42.883Z\", \"assignerShortName\": \"ibm\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.