GHSA-m69x-pw9p-7j3qHighCVSS 7.5

Spring Security SAML2 Service Provider: Unbounded writer inflates the compressed SAML payload into memory (DoS)

Published
June 10, 2026
Last Modified
August 12, 2026

🔗 CVE IDs covered (1)

CVE-2026-40988 →

📋 Description

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.

🎯 Affected products6

  • maven/org.springframework.security:spring-security-saml2-service-provider:>= 7.0.0, <= 7.0.5
  • maven/org.springframework.security:spring-security-saml2-service-provider:>= 6.5.0, <= 6.5.10
  • maven/org.springframework.security:spring-security-saml2-service-provider:>= 6.4.0, <= 6.4.16
  • maven/org.springframework.security:spring-security-saml2-service-provider:>= 6.3.0, <= 6.3.16
  • maven/org.springframework.security:spring-security-saml2-service-provider:>= 5.8.0, <= 5.8.25
  • maven/org.springframework.security:spring-security-saml2-service-provider:<= 5.7.23

🔗 References (5)