{
"id": "GHSA-p5mv-gj8j-xqgf",
"aliases": [
"CVE-2026-7307"
],
"details": "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.",
"summary": "Keycloak: Denial of Service via specially crafted SAML input",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "26.6.2"
}
]
}
],
"package": {
"name": "org.keycloak:keycloak-saml-core",
"ecosystem": "Maven"
}
}
],
"modified": "2026-06-04T15:36:05Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"published": "2026-05-19T12:31:41Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7307",
"type": "ADVISORY"
},
{
"url": "https://github.com/keycloak/keycloak/pull/49119",
"type": "WEB"
},
{
"url": "https://github.com/keycloak/keycloak/commit/be84d28ce4c69c038d542f11405d5ede1d61f4a9",
"type": "WEB"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:19594",
"type": "WEB"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:19595",
"type": "WEB"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:19596",
"type": "WEB"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:19597",
"type": "WEB"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-7307",
"type": "WEB"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476526",
"type": "WEB"
},
{
"url": "https://github.com/keycloak/keycloak",
"type": "PACKAGE"
},
{
"url": "https://github.com/keycloak/keycloak/releases/tag/26.6.2",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-1286"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-05-19T12:16:19Z",
"github_reviewed_at": "2026-06-04T15:36:05Z"
}
}