Quick answers
- Is CVE-2026-11547 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-11547 being exploited in the wild.
- How severe is CVE-2026-11547?
- Medium severity, with a CVSS score of 4.3, published 8 November 2026.
- Which products and versions are affected?
- IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.10.
- Is there a fix for CVE-2026-11547?
- Yes: fixed in WebSphere Application Server Liberty 26.0.0.11 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-11547 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-11547?
- Check whether you run 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.
How to fix
- Fixed in: WebSphere Application Server Liberty 26.0.0.11 or later
Technical details
The vulnerability is a server-side request forgery (SSRF) in the Admin Center's deploy validation endpoint that allows an authenticated user with sufficient privileges to make arbitrary requests to internal resources. The attack requires prior authentication and network access to the Admin Center, but does not require user interaction. An attacker can retrieve sensitive information or interact with internal services on behalf of the vulnerable server.
Affected products
- IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.10
Timeline
- 2026-11-08: disclosed