{"id":"GHSA-m69x-pw9p-7j3q","summary":"Spring Security SAML2 Service Provider: Unbounded writer inflates the compressed SAML payload into memory (DoS)","details":"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.\n\nAffected versions:\nSpring 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.","aliases":["CVE-2026-40988"],"modified":"2026-08-12T15:56:09.155368Z","published":"2026-06-10T00:31:51Z","database_specific":{"nvd_published_at":"2026-06-10T00:16:49Z","cwe_ids":["CWE-400"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-08-12T15:40:10Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40988"},{"type":"PACKAGE","url":"https://github.com/spring-projects/spring-security"},{"type":"WEB","url":"https://github.com/spring-projects/spring-security/releases/tag/6.5.11"},{"type":"WEB","url":"https://github.com/spring-projects/spring-security/releases/tag/7.0.6"},{"type":"WEB","url":"https://spring.io/security/cve-2026-40988"}],"affected":[{"package":{"name":"org.springframework.security:spring-security-saml2-service-provider","ecosystem":"Maven","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.0.6"}]}],"versions":["7.0.0","7.0.1","7.0.2","7.0.3","7.0.4","7.0.5"],"database_specific":{"last_known_affected_version_range":"\u003c= 7.0.5","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-m69x-pw9p-7j3q/GHSA-m69x-pw9p-7j3q.json"}},{"package":{"name":"org.springframework.security:spring-security-saml2-service-provider","ecosystem":"Maven","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.5.0"},{"fixed":"6.5.11"}]}],"versions":["6.5.0","6.5.1","6.5.10","6.5.2","6.5.3","6.5.4","6.5.5","6.5.6","6.5.7","6.5.8","6.5.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-m69x-pw9p-7j3q/GHSA-m69x-pw9p-7j3q.json","last_known_affected_version_range":"\u003c= 6.5.10"}},{"package":{"name":"org.springframework.security:spring-security-saml2-service-provider","ecosystem":"Maven","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.4.0"},{"last_affected":"6.4.16"}]}],"versions":["6.4.0","6.4.1","6.4.10","6.4.11","6.4.12","6.4.13","6.4.2","6.4.3","6.4.4","6.4.5","6.4.6","6.4.7","6.4.8","6.4.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-m69x-pw9p-7j3q/GHSA-m69x-pw9p-7j3q.json"}},{"package":{"name":"org.springframework.security:spring-security-saml2-service-provider","ecosystem":"Maven","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"last_affected":"6.3.16"}]}],"versions":["6.3.0","6.3.1","6.3.10","6.3.2","6.3.3","6.3.4","6.3.5","6.3.6","6.3.7","6.3.8","6.3.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-m69x-pw9p-7j3q/GHSA-m69x-pw9p-7j3q.json"}},{"package":{"name":"org.springframework.security:spring-security-saml2-service-provider","ecosystem":"Maven","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.8.0"},{"last_affected":"5.8.25"}]}],"versions":["5.8.0","5.8.1","5.8.10","5.8.11","5.8.12","5.8.13","5.8.14","5.8.15","5.8.16","5.8.2","5.8.3","5.8.4","5.8.5","5.8.6","5.8.7","5.8.8","5.8.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-m69x-pw9p-7j3q/GHSA-m69x-pw9p-7j3q.json"}},{"package":{"name":"org.springframework.security:spring-security-saml2-service-provider","ecosystem":"Maven","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"5.7.23"}]}],"versions":["5.2.0.RELEASE","5.2.1.RELEASE","5.2.10.RELEASE","5.2.11.RELEASE","5.2.12.RELEASE","5.2.13.RELEASE","5.2.14.RELEASE","5.2.15.RELEASE","5.2.2.RELEASE","5.2.3.RELEASE","5.2.4.RELEASE","5.2.5.RELEASE","5.2.6.RELEASE","5.2.7.RELEASE","5.2.8.RELEASE","5.2.9.RELEASE","5.3.0.RELEASE","5.3.1.RELEASE","5.3.10.RELEASE","5.3.11.RELEASE","5.3.12.RELEASE","5.3.13.RELEASE","5.3.2.RELEASE","5.3.3.RELEASE","5.3.4.RELEASE","5.3.5.RELEASE","5.3.6.RELEASE","5.3.7.RELEASE","5.3.8.RELEASE","5.3.9.RELEASE","5.4.0","5.4.1","5.4.10","5.4.11","5.4.2","5.4.3","5.4.4","5.4.5","5.4.6","5.4.7","5.4.8","5.4.9","5.5.0","5.5.1","5.5.2","5.5.3","5.5.4","5.5.5","5.5.6","5.5.7","5.5.8","5.6.0","5.6.1","5.6.10","5.6.11","5.6.12","5.6.2","5.6.3","5.6.4","5.6.5","5.6.6","5.6.7","5.6.8","5.6.9","5.7.0","5.7.1","5.7.10","5.7.11","5.7.12","5.7.13","5.7.14","5.7.2","5.7.3","5.7.4","5.7.5","5.7.6","5.7.7","5.7.8","5.7.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-m69x-pw9p-7j3q/GHSA-m69x-pw9p-7j3q.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}