IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Request Smuggling
IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are vulnerable to HTTP request smuggling, caused by improper parsing of the HTTP transfer-encoding request header. By sending a specially crafted HTTP transfer-encoding request header, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.
CVE-2026-15634
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-15634
WebSphere Application Server
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
WebSphere Application Server - Liberty
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"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"
}
],
"defaultStatus": "unaffected"
},
{
"cpes": [
"cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*",
"cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.8:*:*:*:*:*:*:*"
],
"vendor": "IBM",
"product": "WebSphere Application Server - Liberty",
"versions": [
{
"status": "affected",
"version": "17.0.0.3",
"versionType": "semver",
"lessThanOrEqual": "26.0.0.5"
}
]
}
]- Related CVEs
- CVE-2026-15634
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #52303 · Revision 1
- Added to Heist Feed
- Publisher date