{"id":"EM-20261106-E14S","url":"https://cyber.eventmonitor.net/incident/EM-20261106-E14S/armeria-saml-vulnerability-cve-2026-121820/","type":"cve","title":"armeria-saml Vulnerability (CVE-2026-121820)","subtitle":"CVE-2026-121820","subject":"CVE-2026-121820","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-06T08:17:20.410Z","firstSignal":"2026-11-06T07:46:48.000Z","lastSignal":"2026-11-06T08:17:20.410Z","updated":"2026-11-06T12:16:45.734Z","revision":1,"life":[{"status":"Born","at":"2026-11-06T08:17:20.410Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-06T08:17:20.410Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-06T07:46:48.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-06T08:17:20.410Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261106-E14S created."}],"stages":[{"name":"Disclosed","at":"2026-11-06T08:17:20.410Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-06T08:17:20.410Z","detail":"CVSS 8.7"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-06T07:46:48.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-06T07:46:48.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-121820 (important)","text":"com.linecorp.armeria/armeria-saml: armeria-saml: Denial of Service via decompression of untrusted SAML messages","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-121820.json"},{"at":"2026-11-06T08:17:20.410Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-121820 (CVSS 8.7)","text":"A vulnerability has been identified in armeria-saml versions prior to 1.43.0, where the HTTP-Redirect binding decoder decompresses attacker-supplied SAML messages without limiting the output size before signature validation, allowing an unauthenticated remote attacker to exhaust server memory and cause a denial of service.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121820"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-06T08:17:20.410","score":8.7,"severity":"HIGH","desc":"A vulnerability has been identified in armeria-saml versions prior to 1.43.0, where the HTTP-Redirect binding decoder decompresses attacker-supplied SAML messages without limiting the output size before signature validation, allowing an unauthenticated remote attacker to exhaust server memory and…","product":"","seen":1793962668170},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}