CVE-2026-53424: Authentication Bypass by Capture-replay

Authentication Bypass by Capture-replay vulnerability in dropbox samly allows an attacker to authenticate as the subject of a captured SAML assertion by resubmitting it. Samly.Helper.decodeidpauthresp/3 in lib/samly/helper.ex calls esamlsp:validateassertion/2, whose default duplicate detector is ...