Cross-site Scripting (XSS) The advisory has been revoked - it doesn't affect any version of package keycloak-26.3 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-KEYCLOAK263-12155819
- published12 Jan 2026
- disclosed26 Oct 2017
Introduced: 26 Oct 2017
CVE-2017-12158 (opens in a new tab)Amendment
The Chainguard security team deemed this advisory irrelevant for Chainguard:latest.
NVD Description
Note: Versions mentioned in the description apply only to the upstream keycloak-26.3 package and not the keycloak-26.3 package as distributed by Chainguard.
It was found that Keycloak would accept a HOST header URL in the admin console and use it to determine web resource locations. An attacker could use this flaw against an authenticated user to attain reflected XSS via a malicious server.