Quick answers
- Is CVE-2026-16187 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-16187 being exploited in the wild.
- How severe is CVE-2026-16187?
- Medium severity, with a CVSS score of 6.5, published 14 September 2026.
- Which products and versions are affected?
- IBM WebSphere Application Server 8.5 prior to 8.5.5.31, 9.0 prior to 9.0.5.29.
- Is there a fix for CVE-2026-16187?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-16187 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-16187?
- Check whether you run IBM WebSphere Application Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This vulnerability is an authentication bypass affecting the admin console servlet in IBM WebSphere Application Server versions 8.5 and 9.0 (fixed in 8.5.5.31 and 9.0.5.29). The vulnerability allows a remote attacker to craft a request that bypasses authentication controls without requiring valid credentials. Attack vectors are network-based and no prior authentication or user interaction is required. A successful exploit grants unauthorized access to sensitive information and administrative functions, potentially leading to full system compromise.
Affected products
- IBM WebSphere Application Server 8.5 prior to 8.5.5.31, 9.0 prior to 9.0.5.29
Timeline
- 2026-09-14: disclosed