{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40988", "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "state": "PUBLISHED", "assignerShortName": "vmware", "dateReserved": "2026-04-16T02:19:09.389Z", "datePublished": "2026-06-09T23:46:15.589Z", "dateUpdated": "2026-06-09T23:46:15.589Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "shortName": "vmware", "dateUpdated": "2026-06-09T23:46:15.589Z"}, "title": "Unbounded DEFLATE Inflation in SAML 2.0 Service Provider", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-400", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "An unauthenticated remote attacker can cause denial of service by sending a crafted SAML REDIRECT binding request that inflates an unbounded compressed payload into memory."}]}], "affected": [{"vendor": "Spring", "product": "Spring Security", "defaultStatus": "unaffected", "versions": [{"status": "affected", "version": "5.7.0", "lessThan": "5.7.24", "versionType": "custom"}, {"status": "affected", "version": "5.8.0", "lessThan": "5.8.26", "versionType": "custom"}, {"status": "affected", "version": "6.3.0", "lessThan": "6.3.17", "versionType": "custom"}, {"status": "affected", "version": "6.4.0", "lessThan": "6.4.17", "versionType": "custom"}, {"status": "affected", "version": "6.5.0", "lessThan": "6.5.11", "versionType": "custom"}, {"status": "affected", "version": "7.0.0", "lessThan": "7.0.6", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "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."}]}], "references": [{"url": "https://spring.io/security/cve-2026-40988"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-40988", "lastModified": "2026-06-10T00:16:49.527", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security@vmware.com", "type": "Secondary"}]}, "published": "2026-06-10T00:16:49.527", "references": [{"source": "security@vmware.com", "url": "https://spring.io/security/cve-2026-40988"}], "sourceIdentifier": "security@vmware.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "security@vmware.com", "type": "Secondary"}]}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.7.0,5.7.24)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.8.0,5.8.26)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.3.0,6.3.17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.0,6.4.17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.5.0,6.5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.0.0,7.0.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Spring Security", "source": "cna", "vendor": "Spring"}, "product": "spring_security", "vendor": "spring"}], "created": "2026-06-10T01:45:18.714792+00:00", "updated": "2026-06-10T03:15:20.346837+00:00", "vendors": ["spring", "spring$PRODUCT$spring_security"]}