{"id":"CVE-2026-121820","title":"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 …","summary":"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 …","severity":"high","cvss":8.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-409"],"vendor":"LY Corporation","product":"Armeria","affected":["Armeria (all versions)"],"published":"2026-11-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T07:46:48.261Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121820","references":[{"url":"https://line.github.io/security-advisory-blog/CVE-2026-121820/"},{"url":"https://github.com/line/armeria/security/advisories/GHSA-6hgp-j5h7-33m3"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T08:48:01.716Z","epss":0.004,"epssPercentile":0.34493,"slug":"CVE-2026-121820","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `Armeria (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}