Known vulnerabilities in Red Hat build of Keycloak 26.6.8

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CVE list

CVE	Summary	Score	Published
CVE-2026-93567	Io.netty/netty-codec-http2: http/1 authority-form connect is translated to malformed http/2 connect with host-controlled :authority	7.5 High	Sep 18, 2026
CVE-2026-93566	Io.netty/netty-codec-http: netty: http request smuggling due to control characters in the chunk-size line	6.5 Medium	Sep 18, 2026
CVE-2026-93565	Io.netty/netty-codec-http: netty rtspdecoder method-token smuggling via trailing control byte	7.5 High	Sep 18, 2026
CVE-2026-93564	Io.netty/netty-codec-haproxy: netty: haproxy proxy-v2 nested-tlv grandchild bytebuf reference-count leak (incomplete fix of pr #16881)	7.5 High	Sep 18, 2026
CVE-2026-93558	Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service	7.5 High	Sep 18, 2026
CVE-2026-93492	Io.netty/netty-codec-http2: netty: http/2 hpackencoder dos with large table size	5.3 Medium	Sep 18, 2026
CVE-2026-93491	Io.netty/netty-codec-http: netty: denial of service via unbounded httpservercodec http/1.1 pipeline queue	7.5 High	Sep 18, 2026
CVE-2026-93488	Io.netty/netty-codec-http: netty: denial of service via unbounded concurrent spdy streams	7.5 High	Sep 18, 2026
CVE-2026-92358	Keycloak-services: keycloak-services: residual cross-browser account-link proof allows silent re-linking	6.4 Medium	Sep 16, 2026
CVE-2026-89298	Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients role via client registration get	4.9 Medium	Sep 11, 2026
CVE-2026-88770	Keycloak-services: keycloak-services: device authorization grant issues tokens to brute-force-locked accounts	6.5 Medium	Sep 10, 2026
CVE-2026-82968	Keycloak-services: keycloak-services: cross-session email verification proof not bound to upstream identity for social providers	6.4 Medium	Sep 2, 2026
CVE-2026-19611	Wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: password keyspace reduction via nfkc fullwidth folding	7.4 High	Aug 20, 2026
CVE-2026-19608	Keycloak-services: keycloak-services: name-only group claims let same-name groups satisfy path-specific group policies	5.3 Medium	Aug 18, 2026
CVE-2026-18569	Keycloak-services: keycloak-services: oidc backchannel logout accepts unsigned forged logout tokens	3.7 Low	Aug 4, 2026
CVE-2026-18206	Keycloak-services: keycloak-services: client policy source-host wildcard domain matching bypass	3.7 Low	Jul 31, 2026
CVE-2026-18203	Keycloak-services: keycloak-services: group policy extendchildren matches sibling group path prefixes	6.5 Medium	Jul 31, 2026
CVE-2026-18208	Keycloak-services: keycloak-services: inactive out-of-audience token introspection leaks signed jwt claim	6.5 Medium	Jul 31, 2026
CVE-2026-18217	Keycloak-services: keycloak-services: saml http-redirect binding response preserves query string leading to parameter pollution	3.4 Low	Jul 31, 2026
CVE-2026-18207	Keycloak-services: keycloak-services: client policy source-group condition bypass via duplicate group name matching	6.5 Medium	Jul 29, 2026
CVE-2026-16103	Keycloak-services: keycloak-services: incomplete fix for ciba brute-force lockout bypass at token redemption	4.3 Medium	Jul 17, 2026
CVE-2026-15943	Keycloak-services: keycloak-services: oidc idp update reuses masked client secret after token url change	5.5 Medium	Jul 17, 2026
CVE-2026-12388	Keycloak-broker: keycloak: privilege escalation to realm administrator via improper authorization in identity provider mapper	6.5 Medium	Jun 30, 2026

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