Answer in brief
CVE-2026-9086 records a High severity (CVSS 7.3) vulnerability in Keycloak vulnerable to cross-site scripting (xss) via case-insensitive uri validation bypass. The current sources do not mark it as known exploited. The current feed maps org.keycloak:keycloak-services (maven), org.keycloak:keycloak-services (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.keycloak:keycloak-services (maven), org.keycloak:keycloak-services (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.keycloak:keycloak-servicesmaven | <26.6.4 | 26.6.4 |
| org.keycloak:keycloak-servicesmaven | >=0 <26.6.4 | 26.6.4 |
Published upstream
Jun 25, 2026
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Oct 29, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
### Description A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with `manage-client` permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a specially crafted redirect URI using a case-insensitive `javascript:` or `data:` scheme. This Cross-Site Scripting (XSS) vulnerability allows for arbitrary code execution in the Keycloak origin when a victim clicks the crafted link, such as in the logout flow or the Admin Console.
Quoted source text, attributed separately from HOL analysis.