Quick answers
- Is CVE-2026-15412 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-15412 being exploited in the wild.
- How severe is CVE-2026-15412?
- 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-2026-15412?
- 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-2026-15412 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-15412?
- Check whether you run IBM WebSphere Application Server or IBM WebSphere Application Server Liberty 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 is a URL open redirect vulnerability (CWE-601) in IBM WebSphere Application Server 8.5, 9.0, and WebSphere Application Server - Liberty. The vulnerability allows unauthenticated, network-accessible attackers to craft specially crafted URLs that redirect users to attacker-controlled websites. No special privileges or user interaction beyond clicking a link is required. By exploiting this flaw, attackers can conduct phishing attacks, spoof trusted URLs, and deceive victims into visiting malicious sites. Patched versions are available (9.0.5.29 and 8.5.5.31 or later).
Affected products
- IBM WebSphere Application Server 8.5 prior to 8.5.5.31, 9.0 prior to 9.0.5.29
- IBM WebSphere Application Server - Liberty
Timeline
- 2026-09-14: disclosed
- 2026-09-14: advisory