Quick answers
- Is CVE-2026-11854 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-11854 being exploited in the wild.
- How severe is CVE-2026-11854?
- Medium severity, with a CVSS score of 6.1, published 28 October 2026.
- Which products and versions are affected?
- Wso2 <UNKNOWN> <UNKNOWN>.
- Is there a fix for CVE-2026-11854?
- 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-2026-11854 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-11854?
- Check whether you run Wso2 <UNKNOWN> 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
A reflected cross-site scripting (XSS) vulnerability exists in the authentication endpoint where unsanitized request data is included in error messages returned to the client. An unauthenticated attacker can craft a malicious URL containing JavaScript payloads that will execute in a victim's browser when the error page is rendered. Exploitation requires user interaction (clicking a link) but session hijacking is prevented by the httpOnly flag on session cookies.
Affected products
- WSO2 <UNKNOWN> <UNKNOWN>
Timeline
- 2026-10-28: disclosed