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 vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.
PUBLISHED5.2ApplicationCWE-400
IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities
Problem type
Affected products
IBM
WebSphere Application Server
<= 7.0.2 Interim Fix 035 - AFFECTED
<= 7.0.3 Interim Fix 017 - AFFECTED
WebSphere Application Server - Liberty
<= 26.0.0.6 - AFFECTED
References
GitHub Security Advisories
GHSA-j7mw-rcxc-j56c
IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0...
https://github.com/advisories/GHSA-j7mw-rcxc-j56cIBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-9320Click to expand
{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-9320",
"assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
"assignerShortName": "ibm",
"dateUpdated": "2026-06-22T16:05:22.609Z",
"dateReserved": "2026-05-22T20:33:33.213Z",
"datePublished": "2026-06-22T14:53:36.057Z",
"state": "PUBLISHED"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
"shortName": "ibm",
"dateUpdated": "2026-06-22T14:54:35.574Z"
},
"title": "IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities",
"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 vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<p>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 vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.</p>"
}
]
}
],
"affected": [
{
"vendor": "IBM",
"product": "WebSphere Application Server",
"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:*:*:*:*:*:*:*"
],
"versions": [
{
"version": "9.0.0",
"status": "affected",
"versionType": "semver",
"lessThanOrEqual": "7.0.2 Interim Fix 035"
},
{
"version": "8.5.0",
"status": "affected",
"versionType": "semver",
"lessThanOrEqual": "7.0.3 Interim Fix 017"
}
]
},
{
"vendor": "IBM",
"product": "WebSphere Application Server - Liberty",
"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:*:*:*:*:*:*:*"
],
"versions": [
{
"version": "17.0.0.3",
"status": "affected",
"versionType": "semver",
"lessThanOrEqual": "26.0.0.6"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "CWE-400 Uncontrolled Resource Consumption",
"cweId": "CWE-400",
"type": "CWE"
}
]
}
],
"references": [
{
"url": "https://www.ibm.com/support/pages/node/7276579",
"tags": [
"vendor-advisory",
"patch"
]
}
],
"metrics": [
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
],
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM"
}
}
],
"solutions": [
{
"lang": "en",
"value": "IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH71631 and PH71370. 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 . \n\n\n\nFor IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.6 using the servlet-3.0, servlet-3.1, servlet-4.0, servlet-5.0, servlet-6.0, servlet-6.1, websocket-1.0, websocket-1.1, websocket-2.0, websocket-2.1, or websocket-2.2 feature:\n\n\n\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71631 https://www.ibm.com/support/pages/node/7276381 \n--OR--\n· Apply Fix Pack 26.0.0.7 or later (targeted availability 3Q2026).\n\n\n\n\n\nFor IBM WebSphere Application Server traditional:\n\n\n\nFor V9.0.0.0 through 9.0.5.28:\n· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71370 https://www.ibm.com/support/pages/node/7276399 \n--OR--\n· Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026). \n\n\n\nFor V8.5.0.0 through 8.5.5.29:\n· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix that resolves PH71370 https://www.ibm.com/support/pages/node/7276399 \n--OR--\n· Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).\n\n\n\n\n\n\n\nAdditional interim fixes may be available and linked off the interim fix download page.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<p>IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH71631 and PH71370. To determine if a feature is enabled for WebSphere Application Server Liberty, refer to <a href=\"https://www.ibm.com/support/pages/node/6553910\" rel=\"nofollow\">How to determine if Liberty is using a specific feature</a>. </p><div><p><strong>For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.6 using the servlet-3.0, servlet-3.1, servlet-4.0, servlet-5.0, servlet-6.0, servlet-6.1, websocket-1.0, websocket-1.1, websocket-2.0, websocket-2.1, or websocket-2.2 feature:</strong></p><p>· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves <a href=\"https://www.ibm.com/support/pages/node/7276381\" rel=\"nofollow\">PH71631</a><br>--OR--<br>· Apply Fix Pack 26.0.0.7 or later (targeted availability 3Q2026).</p></div><p><strong>For IBM WebSphere Application Server traditional:</strong></p><p><strong>For V9.0.0.0 through 9.0.5.28:</strong><br>· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves <a href=\"https://www.ibm.com/support/pages/node/7276399\" rel=\"nofollow\">PH71370</a><br>--OR--<br>· Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026). </p><p><strong>For V8.5.0.0 through 8.5.5.29:</strong><br>· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix that resolves <a href=\"https://www.ibm.com/support/pages/node/7276399\" rel=\"nofollow\">PH71370</a><br>--OR--<br>· Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).</p><p></p><p>Additional interim fixes may be available and linked off the interim fix download page.</p>"
}
]
}
]
},
"adp": [
{
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-06-22T16:05:22.609Z"
},
"title": "CISA ADP Vulnrichment",
"metrics": [
{}
]
}
]
}
}