CVE-2026-8646 IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities
Remote attackers can exploit HTTP request smuggling in WebSphere to bypass controls, spoof identity, escalate privileges, and expose sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8646?
CVE-2026-8646 is a high-severity vulnerability in Ibm Websphere Application Server, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-444
Which versions are affected by CVE-2026-8646?
It affects 1 product.
Products include Ibm Websphere Application Server.
How do I fix CVE-2026-8646?
No fix has been published for CVE-2026-8646 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-8646 being exploited?
There is no known exploitation of CVE-2026-8646 in the wild and no public exploit code.
Other vulnerabilities in Ibm Websphere Application Server
Sources
Also known as GHSA-gmfx-j9mc-3x8v.