PT-2026-51344 · Ibm · Ibm Websphere Application Server Liberty+2

Published 2026-06-22 · Updated 2026-06-22 · CVE-2026-8646

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions IBM WebSphere Application Server 9.0 IBM WebSphere Application Server 8.5 IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.6

Description HTTP request smuggling occurs when a remote attacker sends a specially crafted request to the application server. This allows the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information. HTTP request smuggling is a technique where the attacker interferes with the way a website processes sequences of HTTP requests, typically by exploiting discrepancies in how a front-end proxy and a back-end server interpret the Content-Length or Transfer-Encoding headers.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2026-8646

Affected Products

Ibm Websphere Application Server Liberty

Websphere Application Server 8.5

Websphere Application Server 9.0

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-8646 · Security Note
• https://twitter.com/VulmonFeeds/status/2069136045065531614 · Twitter Post
• https://ibm.com/support/pages/node/7276579 · Patch, Vendor Advisory