CVE-2026-121820 · Package
NO FIX YET · SEE WHAT TO DO
armeria-saml's HTTP-Redirect binding decompresses incoming SAML messages without an output size limit before checking the signature. An unauthenticated attacker can send a small compressed payload that expands to exhaust server memory and crash the service.
first public Nov 6, 2026 · 1 source
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Applications that use armeria-saml to handle SAML single sign-on through the HTTP-Redirect binding are exposed, and the flaw is reachable without logging in. Services that do not use armeria-saml, or that do not accept SAML HTTP-Redirect requests, can skip it.
Not affected if http-post-binding-only, no-saml-sso
Who cares armeria-saml, java, saml, sso
armeria-saml in build.gradle or pom.xml) and see whether it is below 1.43.01.43.0 or laterA 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.
This page as .md · .json · 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
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