{"id":"CVE-2026-7307","title":"A flaw was found in Keycloak","summary":"A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-1286"],"vendor":"redhat","product":"build_of_keycloak","affected":["build_of_keycloak >= 26.4, < 26.4.12"],"patched":["build_of_keycloak 26.4.12"],"published":"2026-05-19","updated":"2026-10-06","sourceUpdated":"2026-10-06T17:17:26.963","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-7307","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:19594","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:19595","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:19596","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:19597","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76128","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76129","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76130","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76132","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76134","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-7307","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2476526","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:19594","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:19595","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:19596","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:19597","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-7307","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2476526","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7307.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-7307"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7307"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00878,"epssPercentile":0.58861,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-05-19T12:49:06.304635Z"},"ingestedAt":"2026-09-29T16:39:33.225Z","slug":"CVE-2026-7307","body":"## Overview\n\nA flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.\n\n## Affected\n\n- `build_of_keycloak >= 26.4, < 26.4.12`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `build_of_keycloak 26.4.12`\n\n## Vendor advisories\n\n- **RHSA-2026:76134** · Red Hat · fixed in: Middleware Containers for OpenShift · released 2026-10-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:76134)\n- **RHSA-2026:19595** · Red Hat · fixed in: Red Hat build of Keycloak 26.2 · released 2026-05-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:19595)\n- **RHSA-2026:19597** · Red Hat · fixed in: Red Hat build of Keycloak 26.4 · released 2026-05-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:19597)\n- **RHSA-2026:76132** · Red Hat · fixed in: Red Hat Single Sign-On 7.6.13 · released 2026-10-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:76132)\n- **RHSA-2026:19594** · Red Hat · fixed in: Red Hat build of Keycloak 26.2.16 · released 2026-05-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:19594)\n- **RHSA-2026:19596** · Red Hat · fixed in: Red Hat build of Keycloak 26.4.12 · released 2026-05-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:19596)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}