CVE-2026-40988 — Unbounded DEFLATE Inflation in SAML 2.0 Service Provider
An application using spring-security-saml2-service-provider and the REDIRECT binding for SAML 2.0 Login or Logout may be vulnerable to a denial of service by way of an unbounded…
Published: 2026-06-09 · CVSS: 7.5 · CVSS 3.1
An application using spring-security-saml2-service-provider and the REDIRECT binding for SAML 2.0 Login or Logout may be vulnerable to a denial of service by way of an unbounded writer that inflates the compressed SAML payload into memory. Affected versions: Spring Security 5.7.0 through 5.7.23; 5.8.0 through 5.8.25; 6.3.0 through 6.3.16; 6.4.0 through 6.4.16; 6.5.0 through 6.5.10; 7.0.0 through 7.0.5.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7