CVE-2026-105443 IBM WebSphere Application Server Liberty is affected by an improper access control
Insufficient isolation between servers sharing an install allows attackers to bypass access controls and potentially read data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105443?
CVE-2026-105443 is a high-severity missing authorization vulnerability in IBM WebSphere Application Server - Liberty, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 has insufficient isolation between servers sharing an install.
Weakness: CWE-284
Which versions are affected by CVE-2026-105443?
How do I fix CVE-2026-105443?
No fix has been published for CVE-2026-105443 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-105443 being exploited?
There is no known exploitation of CVE-2026-105443 in the wild and no public exploit code.
Sources
Also known as GHSA-h2rr-h6w6-w29v.