{"cve":"CVE-2026-7307","nvd":{"published":"2026-05-19T12:16:19.423","modified":"2026-10-26T13:10:00.140","status":"Modified","description":"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, leading to a Denial of Service (DoS) where the server becomes unavailable.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-1286"],"references":["https://access.redhat.com/errata/RHSA-2026:19594","https://access.redhat.com/errata/RHSA-2026:19595","https://access.redhat.com/errata/RHSA-2026:19596","https://access.redhat.com/errata/RHSA-2026:19597","https://access.redhat.com/errata/RHSA-2026:76128"],"products":["redhat:build_of_keycloak"],"source":"nvd","synced_at":"2026-10-26T13:39:24.642594360+00:00"},"epss":{"cve":"CVE-2026-7307","score":0.00878,"percentile":0.58787,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-p5mv-gj8j-xqgf","url":"https://osv.dev/vulnerability/GHSA-p5mv-gj8j-xqgf","summary":"Keycloak: Denial of Service via specially crafted SAML input","modified":"2026-08-26T01:11:34.032500649Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-saml-core","purl":"pkg:maven/org.keycloak/keycloak-saml-core","ranges":["<26.6.2"],"fixed":["26.6.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}