{"id":"CVE-2026-121820","aliases":["EUVD-2026-117987","GHSA-6hgp-j5h7-33m3"],"status":"published","description":"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.","severity":{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.004,"percentile":0.3474,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2026-11-06T07:46:48Z","modified":"2026-11-07T02:48:23Z","products":[{"vendor":"line corporation","product":"armeria"},{"vendor":"ly corporation","product":"armeria"}],"references":[{"url":"https://line.github.io/security-advisory-blog/CVE-2026-121820/","tags":["advisory"]},{"url":"https://github.com/line/armeria/security/advisories/GHSA-6hgp-j5h7-33m3","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121820.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121820","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-121820","description":"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.","status":"published","published":"2026-11-06T07:46:48.261Z","modified":"2026-11-10T17:24:41.043Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna"}],"updated_at":"2026-11-10T18:39:46.830944Z"}],"euvd":[{"id":"EUVD-2026-117987","description":"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.","status":"published","published":"2026-11-06T07:46:48Z","modified":"2026-11-10T17:24:41Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"updated_at":"2026-11-10T18:21:55.054764Z"}],"nvd":[{"id":"CVE-2026-121820","description":"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.","status":"published","published":"2026-11-06T08:17:20.41Z","modified":"2026-11-10T18:17:20.953Z","cvss":[{"version":"4.0","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"updated_at":"2026-11-06T22:02:17.053381Z"}],"osv":[{"id":"CVE-2026-121820","description":"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.","status":"published","published":"2026-11-06T07:46:48.261Z","modified":"2026-11-12T02:31:06.805778044Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"updated_at":"2026-11-07T03:08:01.726202Z"}]}}