CVE-2026-8858

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 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.ibm.com/support/pages/node/7276560

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:ibm:i:*:*:*:*:*:*:*:*

cpe:2.3:o:ibm:i:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-22 16:16

Updated : 2026-07-09 21:16

NVD link : CVE-2026-8858

Mitre link : CVE-2026-8858

CVE.ORG link : CVE-2026-8858

JSON object : View

Products Affected

ibm

i

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

{"id": "CVE-2026-8858", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8858", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-23T03:56:00.365269Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@us.ibm.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "psirt@us.ibm.com", "affectedData": [{"cpes": ["cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "WebSphere Application Server", "versions": [{"status": "affected", "version": "8.5"}, {"status": "affected", "version": "9.0"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-22T16:16:42.967", "references": [{"url": "https://www.ibm.com/support/pages/node/7276560", "source": "psirt@us.ibm.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "psirt@us.ibm.com", "description": [{"lang": "en", "value": "CWE-94"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-07-09T21:16:56.547", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ibm:i:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "46DEA5F3-B160-471F-8C4C-0E8338EDEDA5", "versionEndIncluding": "7.6", "versionStartIncluding": "7.3"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:ibm:i:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "C684FC45-C9BA-4EF0-BD06-BB289450DD21"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "psirt@us.ibm.com"}