CVE-2026-10842

IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a security bypass vulnerability

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Published Jul 30, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Description

IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 Traditional and Liberty could allow a remote attacker to bypass security constraints.

Analysis

Technical impact

IBM WebSphere Application Server 8.5, 9.0, and the Liberty edition 17.0.0.3 through 26.0.0.7 contain a flaw that permits a remote attacker to bypass configured security constraints, potentially granting unauthorized access or elevated privileges. The vulnerability is mapped to CWE-289, indicating an authentication or authorization bypass weakness. This loss of integrity and confidentiality for protected resources could be exploited to perform actions not intended for the user. While the exact attack vector is not specified in the official description, the vulnerability can be triggered without requiring local access.

Affected Systems

Affected systems include IBM WebSphere Application Server versions 8.5.0 through 8.5.5.30, 9.0.0 through 9.0.5.28, and IBM WebSphere Application Server Liberty versions 17.0.0.3 through 26.0.0.7. The documented fix options vary by product and version, with interim fixes for specific APARs (PH71893 for traditional WAS and PH71916 for Liberty) and subsequent fix packs recommended for each combination. Users should consult IBM's support pages to confirm the applicable version and fix path.

Risk and Exploitability

The CVSS score of 7.5 indicates a high severity vulnerability. The EPSS score of <1% reflects a very low probability of exploitation, although it is not zero. With no inclusion in the CISA KEV catalog, no known public exploits exist. Because the flaw allows a remote attacker to bypass security constraints, an adversary could gain unauthorized access or elevate privileges without local access. Applying the interim fix and then moving to the next available fix pack mitigates the risk, but continuous monitoring for new updates is advisable.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

IBM

WebSphere Application Server

affected

Version	Status	Constraints
`8.5`	affected	—
`9.0`	affected	—

IBM

WebSphere Application Server - Liberty

affected

Version	Status	Constraints
`17.0.0.3`	affected	≤ 26.0.0.7

Configuration 1 [-]

OR	cpe:2.3:a:ibm:websphere_application_server::::::::
	cpe:2.3:a:ibm:websphere_application_server::::::::
	cpe:2.3:a:ibm:websphere_application_server:::::liberty:::*

No data.

Vendor Product Versions

Ibm

Websphere Application Server

Version	Status	Scheme	Platform
`8.5`	affected	generic	—
`9.0`	affected	generic	—

Ibm

Websphere Application Server Liberty

Version	Status	Scheme	Platform
`[17.0.0.3,26.0.0.7]`	affected	semver	—

Remediation

Vendor Solution

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH71893 and PH71916 . To determine if a feature is enabled for WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature https://www.ibm.com/support/pages/node/6553910 . For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.7 using appSecurity-1.0, appSecurity-2.0 , appSecurity-3.0 and appSecurity-4.0 features: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71916 https://www.ibm.com/support/pages/node/7280086 --OR-- · Apply Fix Pack 26.0.0.8 or later (targeted availability 3Q2026). For IBM WebSphere Application Server traditional: For V9.0.0.0 through 9.0.5.28: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71893 https://www.ibm.com/support/pages/node/7280079 --OR-- · Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026). For V8.5.0.0 through 8.5.5.30: · Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix that resolves PH71893 https://www.ibm.com/support/pages/node/7280079 --OR-- · Apply Fix Pack 8.5.5.31 or later (targeted availability 3Q2026). Additional interim fixes may be available and linked off the interim fix download page.

OpenCVE Recommended Actions

Apply the interim fix that resolves PH71893 for traditional WebSphere Application Server or PH71916 for Liberty using IBM's download page
Upgrade to at least the next available fix pack: Liberty 26.0.0.8 or later, WAS 9.0.5.29 or later, or WAS 8.5.5.31 or later
If appSecurity features 1.0 through 4.0 are enabled in Liberty, verify the feature usage against IBM's guidance before applying the fix to ensure no unintended configuration changes

Generated by OpenCVE AI on August 2, 2026 at 05:12 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.526% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://www.ibm.com/support/pages/node/7280131

History

Jul 30, 2026 6:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jul 30, 2026 6:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Ibm websphere Application Server Liberty
Vendors & Products		Ibm websphere Application Server Liberty

Jul 30, 2026 4:15 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 Traditional and Liberty could allow a remote attacker to bypass security constraints.
Title		IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a security bypass vulnerability
First Time appeared		Ibm Ibm websphere Application Server Ibm websphere Application Server Liberty
Weaknesses		CWE-289
CPEs		cpe:2.3:a:ibm:websphere_application_server:8.5.0:::::::* cpe:2.3:a:ibm:websphere_application_server:8.5:::::::* cpe:2.3:a:ibm:websphere_application_server:9.0.0:::::::* cpe:2.3:a:ibm:websphere_application_server:9.0:::::::* cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:::::::* cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.7:::::::*
Vendors & Products		Ibm Ibm websphere Application Server Ibm websphere Application Server Liberty
References		https://www.ibm.com/support/pages/node/7280131
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}`