CVE-2026-11541

IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.ibm.com/support/pages/node/7277550	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

02 Jul 2026, 17:55

Type	Values Removed	Values Added
First Time		Ibm Ibm websphere Application Server
CPE		cpe:2.3:a:ibm:websphere_application_server:::::traditional:::* cpe:2.3:a:ibm:websphere_application_server:::::liberty:::*
References	~~() https://www.ibm.com/support/pages/node/7277550 -~~	() https://www.ibm.com/support/pages/node/7277550 - Vendor Advisory

30 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-30 22:16

Updated : 2026-07-02 17:55

NVD link : CVE-2026-11541

Mitre link : CVE-2026-11541

CVE.ORG link : CVE-2026-11541

JSON object : View

Products Affected

ibm

websphere_application_server

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

{"id": "CVE-2026-11541", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-11541", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-01T14:52:04.153923Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@us.ibm.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/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": 3.9}]}, "affected": [{"source": "psirt@us.ibm.com", "affectedData": [{"cpes": ["cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "WebSphere Application Server", "versions": [{"status": "affected", "version": "9.0"}, {"status": "affected", "version": "8.5"}]}, {"cpes": ["cpe:2.3:a:ibm:websphere_application_server___liberty:17.0.0.3:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:websphere_application_server___liberty:26.0.0.6:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "WebSphere Application Server - Liberty", "versions": [{"status": "affected", "version": "17.0.0.3", "versionType": "semver", "lessThanOrEqual": "26.0.0.6"}]}]}], "published": "2026-06-30T22:16:46.317", "references": [{"url": "https://www.ibm.com/support/pages/node/7277550", "tags": ["Vendor Advisory"], "source": "psirt@us.ibm.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@us.ibm.com", "description": [{"lang": "en", "value": "CWE-444"}]}], "descriptions": [{"lang": "en", "value": "IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability."}], "lastModified": "2026-07-02T17:55:28.050", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:*", "vulnerable": true, "matchCriteriaId": "D0F3A34A-A76C-4929-A3A4-B17271E8B193", "versionEndExcluding": "8.5.5.31", "versionStartIncluding": "8.5.0.0"}, {"criteria": "cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:*", "vulnerable": true, "matchCriteriaId": "2A4B3C11-FDA8-48D6-997F-48EEA8C3CB2C", "versionEndExcluding": "9.0.5.29", "versionStartIncluding": "9.0.0.0"}, {"criteria": "cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*", "vulnerable": true, "matchCriteriaId": "A7115371-D210-4CA1-82E8-36A2B966255A", "versionEndIncluding": "26.0.0.6", "versionStartIncluding": "17.0.0.3"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@us.ibm.com"}