{"id":"CVE-2026-40988","summary":"Unbounded DEFLATE Inflation in SAML 2.0 Service Provider","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.","modified":"2026-07-25T03:32:03.426723670Z","published":"2026-06-09T23:46:15.589Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40988.json","unresolved_ranges":[{"extracted_events":[{"introduced":"5.7.0"},{"fixed":"5.7.24"},{"introduced":"5.8.0"},{"fixed":"5.8.26"},{"introduced":"6.3.0"},{"fixed":"6.3.17"},{"introduced":"6.4.0"},{"fixed":"6.4.17"},{"introduced":"6.5.0"},{"fixed":"6.5.10.2"},{"introduced":"7.0.0"},{"fixed":"7.0.5.1"}],"source":"AFFECTED_FIELD"},{"source":"DESCRIPTION","extracted_events":[{"introduced":"5.7.0"},{"fixed":"5.7.23"},{"introduced":"5.8.0"},{"fixed":"5.8.25"},{"introduced":"6.3.0"},{"fixed":"6.3.16"},{"introduced":"6.4.0"},{"fixed":"6.4.16"},{"introduced":"6.5.0"},{"fixed":"6.5.10"},{"introduced":"7.0.0"},{"fixed":"7.0.5"}]}],"cna_assigner":"vmware","cwe_ids":["CWE-400"]},"references":[{"type":"WEB","url":"https://spring.io/security/cve-2026-40988"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40988.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40988"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/spring-projects/spring-security","events":[{"introduced":"0fd0e9335ae3a6ff3538045d098dd6b94679d99e"},{"fixed":"0a9d4dc8fc9d303dad7fc1ee25cc7381a9888899"},{"introduced":"1d99a7fb14c62354cac00412cce2071892cdf465"},{"fixed":"53bc6a77963209bb2a5f3efdd855b1f4a8051cc3"}],"database_specific":{"source":"DESCRIPTION","extracted_events":[{"introduced":"6.5.0"},{"fixed":"6.5.10"},{"introduced":"7.0.0"},{"fixed":"7.0.5"}]}}],"versions":["7.0.4","6.5.9","6.5.8","7.0.3","7.0.2","7.0.1","6.5.7","7.0.0","6.5.6","6.5.5","6.5.4","6.5.3","6.5.1","6.5.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-40988.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}