CVE-2026-16187 IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities
Remote attackers can bypass authentication and access sensitive information via crafted unauthenticated requests in IBM WebSphere Application Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16187?
CVE-2026-16187 is a medium-severity authentication bypass vulnerability in IBM WebSphere Application Server, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
IBM WebSphere Application Server 9.0, and 8.5 could allow a remote attacker to bypass authentication and obtain sensitive information by sending a crafted unauthenticated request.
Weakness: CWE-862
Which versions are affected by CVE-2026-16187?
How do I fix CVE-2026-16187?
No fix has been published for CVE-2026-16187 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-16187 being exploited?
There is no known exploitation of CVE-2026-16187 in the wild and no public exploit code.
Sources
Also known as GHSA-9p67-pgjv-xprg.