HIGH 7.5 Maven
Spring Security SAML2 Service Provider: Unbounded writer inflates the compressed SAML payload into memory (DoS)
GHSA-m69x-pw9p-7j3q · CVE-2026-40988
Published · Modified
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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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-40988
- PACKAGE https://github.com/spring-projects/spring-security
- WEB https://github.com/spring-projects/spring-security/releases/tag/6.5.11
- WEB https://github.com/spring-projects/spring-security/releases/tag/7.0.6
- WEB https://spring.io/security/cve-2026-40988
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