CVE-2026-1518: Keycloak Server-Side Request Forgery (SSRF) vulnerability

February 2, 2026

A flaw was found in Keycloak’s CIBA feature where insufficient validation of client-configured backchannel notification endpoints could allow blind server-side requests to internal services.

References

access.redhat.com/security/cve/CVE-2026-1518
bugzilla.redhat.com/show_bug.cgi?id=2433727
github.com/advisories/GHSA-fwhw-chw4-gh37
github.com/keycloak/keycloak
nvd.nist.gov/vuln/detail/CVE-2026-1518

Code Behaviors & Features

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