{"answers":{"affected":"12 open source packages ship an affected version, including org.springframework.security:spring-security-saml2-service-provider. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-40988 in the wild and no public exploit code.","fix":"Upgrade org.springframework.security:spring-security-saml2-service-provider to a fixed version for your release line: 6.5.11 or 7.0.6.","what":"CVE-2026-40988 is a high-severity denial of service vulnerability in Spring Security, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-40988 and fix it if it is affected.\n\nWhat it is: CVE-2026-40988 is a high-severity denial of service vulnerability in Spring Security, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-40988 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected all versions up to 5.7.23; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected all versions up to 5.7.23; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 5.8.0 up to 5.8.25; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 5.8.0 up to 5.8.25; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 6.3.0 up to 6.3.16; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 6.3.0 up to 6.3.16; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 6.4.0 up to 6.4.16; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 6.4.0 up to 6.4.16; no fix listed\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 6.5.0; fixed in 6.5.11\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 6.5.0; fixed in 6.5.11\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 7.0.0; fixed in 7.0.6\n- org.springframework.security:spring-security-saml2-service-provider (Maven): affected from 7.0.0; fixed in 7.0.6\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-40988/ (Markdown: https://insights.sbomify.com/CVE-2026-40988/index.md)","id":"CVE-2026-40988","markdown":"https://insights.sbomify.com/CVE-2026-40988/index.md","name":"CVE-2026-40988","record":{"aliases":["CLEANSTART-2026-IF26244","CLEANSTART-2026-SR72438","CLEANSTART-2026-ZK87180","CLSA-2026-1781052748","CLSA-2026-1782867600","CLSA-2026-1783558959","CLSA-2026-1784769577","ECHO-8c32-69df-0a5f","GHSA-m69x-pw9p-7j3q","MINI-7x5c-64hm-mgr9","ROOT-APP-MAVEN-CVE-2026-40988"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Spring Security SAML library","requires_auth":"none","summary":"Attackers can cause denial of service by sending compressed SAML payloads that exhaust memory during inflation in applications using the REDIRECT binding.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"vmware","cpe":[{"product":"spring_security","vendor":"vmware"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"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.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Unbounded DEFLATE Inflation in SAML 2.0 Service Provider","id":"CVE-2026-40988","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":12,"n_references":1,"next":{"headline":"Self Routing guard bypassed via function composition","id":"CVE-2026-40989"},"packages":[{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":["5.7.23"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":null,"source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":["5.7.23"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":[],"introduced":["5.8.0"],"last_affected":["5.8.25"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":null,"source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":[],"introduced":["5.8.0"],"last_affected":["5.8.25"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":[],"introduced":["6.3.0"],"last_affected":["6.3.16"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":null,"source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":[],"introduced":["6.3.0"],"last_affected":["6.3.16"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":[],"introduced":["6.4.0"],"last_affected":["6.4.16"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":null,"source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":[],"introduced":["6.4.0"],"last_affected":["6.4.16"],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":["6.5.11"],"introduced":["6.5.0"],"last_affected":[],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":null,"source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":["6.5.11"],"introduced":["6.5.0"],"last_affected":[],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":["7.0.6"],"introduced":["7.0.0"],"last_affected":[],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":null,"source":"GHSA-m69x-pw9p-7j3q"},{"ecosystem":"Maven","fixed":["7.0.6"],"introduced":["7.0.0"],"last_affected":[],"package":"org.springframework.security:spring-security-saml2-service-provider","purl":"pkg:maven/org.springframework.security/spring-security-saml2-service-provider","source":"GHSA-m69x-pw9p-7j3q"}],"prev":{"headline":"Spring Integration File Support: FTP/SFTP/SMB server can write arbitrary files anywhere on the client filesystem","id":"CVE-2026-40987"},"products":["Spring Security"],"published":"2026-06-09","related":[{"cvss_score":9.8,"headline":"Authorization Bypass in Spring Security","id":"CVE-2014-3527","kev_date_added":null,"published":"2017-05-25"},{"cvss_score":9.6,"headline":"Spring Security OAuth2 Authorization Server: Insufficient validation of Dynamic Client Registration metadata","id":"CVE-2026-59354","kev_date_added":null,"published":"2026-08-27"},{"cvss_score":9.4,"headline":"Spring Security embedded UnboundID LDAP server exposes well-known administrative bind DN on all network interfaces","id":"CVE-2026-59270","kev_date_added":null,"published":"2026-08-27"},{"cvss_score":9.1,"headline":"Under Some Conditions Spring Security HTTP Headers Are not Written","id":"CVE-2026-22732","kev_date_added":null,"published":"2026-03-19"},{"cvss_score":9.1,"headline":"Access Control Bypass in Spring Security","id":"CVE-2023-34034","kev_date_added":null,"published":"2023-07-19"},{"cvss_score":8.2,"headline":"Spring Security Authorization Server Default Consent Page is vulnerable to Cross-Site Scripting (XSS)","id":"CVE-2026-47877","kev_date_added":null,"published":"2026-08-27"},{"cvss_score":8.1,"headline":"Deserialization of Untrusted Data in Spring Security","id":"CVE-2017-4995","kev_date_added":null,"published":"2017-11-27"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-27","vendors":["Spring"]},"summary":"Attackers can cause denial of service by sending compressed SAML payloads that exhaust memory during inflation in applications using the REDIRECT binding.","url":"https://insights.sbomify.com/CVE-2026-40988/"}