CVE-2026-8858: CWE-94 Improper Control of Generation of Code ('Code Injection') in IBM WebSphere Application Server
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.
AI Analysis
Technical Summary
CVE-2026-8858 is a code injection vulnerability (CWE-94) in IBM WebSphere Application Server and WebSphere Application Server Liberty's WebSphere Web Server Plug-in component. An attacker who can impersonate the application server can exploit this flaw by sending specially crafted responses to the plug-in, resulting in remote code execution and denial of service. The vulnerability affects versions 8.5 and 9.0 of the product. No official patch or remediation level has been provided by IBM as of the published date.
Potential Impact
Successful exploitation can lead to remote code execution and denial of service on affected systems. This allows an unauthenticated attacker with network access to the plug-in to execute arbitrary code and disrupt service availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is provided in the available data, organizations should monitor IBM advisories closely and consider restricting network access to the WebSphere Web Server Plug-in component to trusted sources until a patch is available.
CVE-2026-8858: CWE-94 Improper Control of Generation of Code ('Code Injection') in IBM WebSphere Application Server
Description
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.
CVSS v3.1
Score 7.5high
Affected software
cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8858 is a code injection vulnerability (CWE-94) in IBM WebSphere Application Server and WebSphere Application Server Liberty's WebSphere Web Server Plug-in component. An attacker who can impersonate the application server can exploit this flaw by sending specially crafted responses to the plug-in, resulting in remote code execution and denial of service. The vulnerability affects versions 8.5 and 9.0 of the product. No official patch or remediation level has been provided by IBM as of the published date.
Potential Impact
Successful exploitation can lead to remote code execution and denial of service on affected systems. This allows an unauthenticated attacker with network access to the plug-in to execute arbitrary code and disrupt service availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is provided in the available data, organizations should monitor IBM advisories closely and consider restricting network access to the WebSphere Web Server Plug-in component to trusted sources until a patch is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-18T18:06:05.131Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a39572aeed863c81e053843
Added to database: 06/22/2026, 15:39:22 UTC
Last enriched: 07/10/2026, 07:58:49 UTC
Last updated: 08/06/2026, 12:41:12 UTC
Views: 49
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