AI and data stack advisories

Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

IBMCVE-2026-15396

IBM WebSphere Application Server: request smuggling

IBM

CVE-2026-15396 · Published Sep 14, 2026 · updated Sep 16, 2026

Medium6.5
No fix yet
IBM advisory

IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 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.

Affected versions

PackageAffectedFixed in
WebSphere Application Server
Product
<= 9.0No fix yet
<= 8.5No fix yet
Details and references
CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-444

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