{"id":"CVE-2026-85511","title":"A flaw was found in EAP's Elytron","summary":"A flaw was found in EAP's Elytron. An EAP application whose security domain is backed by an Elytron token-realm with oauth2-introspection would allow parameter substitution due to missing URL encoding.","severity":"medium","cvss":4.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-290"],"vendor":"Red Hat","product":"eap8-activemq-artemis","affected":["eap8-activemq-artemis (all versions)","eap8-apache-cxf (all versions)","eap8-artemis-wildfly-integration (all versions)","eap8-bouncycastle (all versions)","eap8-cryptacular (all versions)","eap8-eap-product-conf-parent (all versions)","eap8-hibernate (all versions)","eap8-httpcomponents-asyncclient (all versions)","eap8-ironjacamar (all versions)","eap8-jackson-annotations (all versions)","eap8-jackson-core (all versions)","eap8-jackson-databind (all versions)","eap8-jackson-dataformats-text (all versions)","eap8-jackson-jaxrs-providers (all versions)","eap8-jackson-modules-base (all versions)","eap8-jackson-modules-java8 (all versions)","eap8-jakarta-xml-bind-api (all versions)","eap8-jaxb (all versions)","eap8-jaxbintros (all versions)","eap8-jboss-logging (all versions)","eap8-jboss-remoting (all versions)","eap8-jbossws-api (all versions)","eap8-jbossws-common-tools (all versions)","eap8-jbossws-cxf (all versions)","eap8-jbossws-jaxws-undertow-httpspi (all versions)","eap8-jbossws-spi (all versions)","eap8-jsf-impl (all versions)","eap8-log4j (all versions)","eap8-neethi (all versions)","eap8-netty (all versions)","eap8-netty-transport-native-epoll (all versions)","eap8-nimbus-jose-jwt (all versions)","eap8-parsson (all versions)","eap8-saaj-impl (all versions)","eap8-slf4j (all versions)","eap8-undertow (all versions)","eap8-wildfly (all versions)","eap8-wildfly-elytron (all versions)","eap8-wildfly-javadocs (all versions)","eap8-ws-commons-XmlSchema (all versions)","eap8-xml-security (all versions)","eap8-activemq-artemis (all versions)","eap8-apache-cxf (all versions)","eap8-artemis-wildfly-integration (all versions)","eap8-bouncycastle (all versions)","eap8-cryptacular (all versions)","eap8-eap-product-conf-parent (all versions)","eap8-hibernate (all versions)","eap8-httpcomponents-asyncclient (all versions)","eap8-ironjacamar (all versions)"],"published":"2026-09-18","updated":"2026-09-25","sourceUpdated":"2026-09-25T21:17:23.933","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85511","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:70228","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:70229","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:70230","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:70277","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-85511","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2483140","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85511.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-85511"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85511"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T16:43:50.598569Z"},"epss":0.0028,"epssPercentile":0.20343,"ingestedAt":"2026-09-18T14:43:13.066Z","patched":["jboss_eap_8_1_for_rhel 10","jboss_eap_8_1_for_rhel 8","jboss_eap_8_1_for_rhel 9"],"slug":"CVE-2026-85511","body":"## Overview\n\nA flaw was found in EAP's Elytron. An EAP application whose security domain is backed by an Elytron token-realm with oauth2-introspection would allow parameter substitution due to missing URL encoding.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:70230** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 10 · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70230)\n- **RHSA-2026:70228** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 8 · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70228)\n- **RHSA-2026:70229** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 9 · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70229)\n- **Red Hat VEX** · Low · affected: Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat Single Sign-On 7 · no fix planned: Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat Single Sign-On 7 · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85511.json)","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":23.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}