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Vulnerability · Published Jun 22, 2026 · Assigned by ibm

CVE-2026-8646IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities

High 7.4

In plain English

A high-severity security flaw in WebSphere Application Server from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.6%top 51.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.

Affected products (as reported)

VendorProductVersions
IBM WebSphere Application Server 9.0.0 – through 7.0.2 Interim Fix 0358.5.0 – through 7.0.3 Interim Fix 017
IBM WebSphere Application Server - Liberty 17.0.0.3 – through 26.0.0.6

Weakness: CWE-444 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References