{"cve":"CVE-2026-40988","nvd":{"published":"2026-06-10T00:16:49.527","modified":"2026-07-23T09:10:00.113","status":"Analyzed","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.\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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://spring.io/security/cve-2026-40988"],"products":["vmware:spring_security"],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-40988","score":0.00331,"percentile":0.26322,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-m69x-pw9p-7j3q","url":"https://osv.dev/vulnerability/GHSA-m69x-pw9p-7j3q","summary":"Spring Security SAML2 Service Provider: Unbounded writer inflates the compressed SAML payload into memory (DoS)","modified":"2026-08-12T15:56:00.742012Z","packages":[{"ecosystem":"Maven","name":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","ranges":[">=7.0.0 <7.0.6"],"fixed":["7.0.6"]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","ranges":[">=6.5.0 <6.5.11"],"fixed":["6.5.11"]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","ranges":[">=6.4.0 <=6.4.16"],"fixed":[]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","ranges":[">=6.3.0 <=6.3.16"],"fixed":[]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","ranges":[">=5.8.0 <=5.8.25"],"fixed":[]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","ranges":["<=5.7.23"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}