Descriptions

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

  • CVSSv4.0 Score: 8.7 (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)

Affected Versions

  • armeria-saml before 1.43.0

Fix

  • armeria-saml should be updated to latest version (>= 1.43.0).

Reference

  • https://www.cve.org/CVERecord?id=CVE-2026-121820
  • https://github.com/line/armeria/security/advisories/GHSA-6hgp-j5h7-33m3

Updated: