CVE-2026-8400

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

8.1 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.48%Unchanged since Aug 6, 2026

What each source reports

CVE List Score used 8.1

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

Record: CVE-2026-8400
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-470
Updated: 2026-11-02

EUVDEUVD-2026-53438 8.1

Record: EUVD-2026-53438
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-m4rx-9mrh-59g9 8.1

IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty...

Record: GHSA-m4rx-9mrh-59g9
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-470
Updated: 2026-11-02

NVD 8.1

Record: CVE-2026-8400
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-470
Updated: 2026-11-02

OSVRHSA-2026:52949 8.1

Red Hat Security Advisory: java-1.8.0-ibm security update

Record: RHSA-2026:52949
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVSUSE-SU-2026:3614-1 No score

Security update for java-1_8_0-ibm

This update for java-1_8_0-ibm fixes the following issues:

Update to Java 8.0 Service Refresh 8 Fix Pack 70 (bsc#1273223).

CVE-2026-16243: inconsistent handling of zero length data in arraycmp of the SIMD evaluator (bsc#1274275).
CVE-2026-16439: using -Xtrace to trace method arguments can lead to buffer underflow (bsc#1272250).
CVE-2026-16441: method resolution default method precedence failure (bsc#1272248).
CVE-2026-41254: lcms2: information disclosure or denial of service via integer overflow in CubeSize (bsc#1272459).
CVE-2026-46968: unauthorized creation, deletion or modification access to critical data (bsc#1272224).
CVE-2026-47010: unauthorized update, insert or delete access to data (bsc#1272225).
CVE-2026-47021: partial denial of service via multiple network protocols (bsc#1272227).
CVE-2026-47027: partial denial of service via multiple network protocols (bsc#1272228).
CVE-2026-47057: hang or frequently repeatable crash via multiple network protocols (bsc#1272233).
CVE-2026-47058: unauthorized creation, deletion or modification access to critical data (bsc#1272234).
CVE-2026-47059: partial denial of service via multiple network protocols (bsc#1272235).
CVE-2026-47063: unauthorized creation, deletion or modification access to critical data (bsc#1272236).
CVE-2026-60147: unauthorized update, insert or delete access to data (bsc#1272237).
CVE-2026-8400: malicious IIOP server can induce loading and instantation of arbitrary classes (bsc#1274276).

Record: SUSE-SU-2026:3614-1
Updated: 2026-11-02

OSVSUSE-SU-2026:3615-1 No score

Security update for java-1_8_0-ibm

This update for java-1_8_0-ibm fixes the following issues:

Update to Java 8.0 Service Refresh 8 Fix Pack 70 (bsc#1273223).

CVE-2026-16243: inconsistent handling of zero length data in arraycmp of the SIMD evaluator (bsc#1274275).
CVE-2026-16439: using -Xtrace to trace method arguments can lead to buffer underflow (bsc#1272250).
CVE-2026-16441: method resolution default method precedence failure (bsc#1272248).
CVE-2026-41254: lcms2: information disclosure or denial of service via integer overflow in CubeSize (bsc#1272459).
CVE-2026-46968: unauthorized creation, deletion or modification access to critical data (bsc#1272224).
CVE-2026-47010: unauthorized update, insert or delete access to data (bsc#1272225).
CVE-2026-47021: partial denial of service via multiple network protocols (bsc#1272227).
CVE-2026-47027: partial denial of service via multiple network protocols (bsc#1272228).
CVE-2026-47057: hang or frequently repeatable crash via multiple network protocols (bsc#1272233).
CVE-2026-47058: unauthorized creation, deletion or modification access to critical data (bsc#1272234).
CVE-2026-47059: partial denial of service via multiple network protocols (bsc#1272235).
CVE-2026-47063: unauthorized creation, deletion or modification access to critical data (bsc#1272236).
CVE-2026-60147: unauthorized update, insert or delete access to data (bsc#1272237).
CVE-2026-8400: malicious IIOP server can induce loading and instantation of arbitrary classes (bsc#1274276).

Record: SUSE-SU-2026:3615-1
Updated: 2026-11-02

OSVSUSE-SU-2026:4107-1 No score

Security update for java-1_8_0-ibm

This update for java-1_8_0-ibm fixes the following issues:

Update to Java 8.0 Service Refresh 8 Fix Pack 71 (bsc#1277833):

CVE-2026-8400: flaw in the ORB component may allow a malicious IIOP server to induce loading and instantation of arbitrary classes (bsc#1274276).
CVE-2026-16243: arraycmp SIMD implementation for Z and P does not check if the number of bytes to compare is zero (bsc#1274275).
CVE-2026-16440: a crafted .class file with deeply nested annotations causes a segmentation fault (bsc#1275779).
CVE-2026-60589: OpenJDK: Improve Resource Resolving (bsc#1275777).
CVE-2026-61308: OpenJDK: Enhance HTTP Connections (bsc#1275778).
CVE-2026-70906: OpenJDK: Improve font loading (bsc#1275763).
CVE-2026-70907: OpenJDK: Enhance TLS server (bsc#1275764).
CVE-2026-71054: Vulnerability in Oracle Java SE (component: 2D) (bsc#1277019).
Oracle August 18 2026 CSPU and IBM Security Update August 2026 (bsc#1277833).

Record: SUSE-SU-2026:4107-1
Updated: 2026-11-02

OSVSUSE-SU-2026:4153-1 No score

Security update for java-1_8_0-ibm

This update for java-1_8_0-ibm fixes the following issues:

Update to Java 8.0 Service Refresh 8 Fix Pack 71 (bsc#1277833):

CVE-2026-8400: flaw in the ORB component may allow a malicious IIOP server to induce loading and instantation of arbitrary classes (bsc#1274276).
CVE-2026-16243: arraycmp SIMD implementation for Z and P does not check if the number of bytes to compare is zero (bsc#1274275).
CVE-2026-16440: a crafted .class file with deeply nested annotations causes a segmentation fault (bsc#1275779).
CVE-2026-60589: OpenJDK: Improve Resource Resolving (bsc#1275777).
CVE-2026-61308: OpenJDK: Enhance HTTP Connections (bsc#1275778).
CVE-2026-70906: OpenJDK: Improve font loading (bsc#1275763).
CVE-2026-70907: OpenJDK: Enhance TLS server (bsc#1275764).
CVE-2026-71054: Vulnerability in Oracle Java SE (component: 2D) (bsc#1277019).
Oracle August 18 2026 CSPU and IBM Security Update August 2026 (bsc#1277833).

Record: SUSE-SU-2026:4153-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`java-1.8.0-ibm` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1.8.0-ibm-demo` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1.8.0-ibm-devel` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1.8.0-ibm-headless` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1.8.0-ibm-jdbc` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1.8.0-ibm-plugin` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1.8.0-ibm-src` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1.8.0-ibm-webstart` Red Hat:enterprise_linux:8::supplementary From an advisory covering 14 CVEs	before 1:1.8.0.8.70-1.el8_10	1:1.8.0.8.70-1.el8_10
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 12 SP5-LTSS From an advisory covering 14 CVEs	before 1.8.0_sr8.70-30.153.1	1.8.0_sr8.70-30.153.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 From an advisory covering 14 CVEs	before 1.8.0_sr8.70-30.153.1	1.8.0_sr8.70-30.153.1

Show 20 moreShow less

Affected packages
Package	Affected	Fixed
`java-1_8_0-ibm` SUSE:Linux Enterprise Module for Legacy 15 SP7 From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 15 SP4-LTSS From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 15 SP5-LTSS From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 15 SP6-LTSS From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server for SAP Applications 15 SP4 From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server for SAP Applications 15 SP5 From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server for SAP Applications 15 SP6 From an advisory covering 14 CVEs	before 1.8.0_sr8.70-150000.3.119.1	1.8.0_sr8.70-150000.3.119.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 12 SP5-LTSS From an advisory covering 8 CVEs	before 1.8.0_sr8.71-30.156.1	1.8.0_sr8.71-30.156.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 From an advisory covering 8 CVEs	before 1.8.0_sr8.71-30.156.1	1.8.0_sr8.71-30.156.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Module for Legacy 15 SP7 From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 15 SP4-LTSS From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 15 SP5-LTSS From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server 15 SP6-LTSS From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server for SAP Applications 15 SP4 From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server for SAP Applications 15 SP5 From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1
`java-1_8_0-ibm` SUSE:Linux Enterprise Server for SAP Applications 15 SP6 From an advisory covering 8 CVEs	before 1.8.0_sr8.71-150000.3.125.1	1.8.0_sr8.71-150000.3.125.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-8400 is a high vulnerability (CVSS 8.1) in Ibm Websphere Application Server, published August 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. No source names a fixed version.

References

Show 115 moreShow less