{"id":"CVE-2026-40996","aliases":["GHSA-p7qj-2q5w-f9r7"],"url":"https://o3.security/vulnerability/CVE-2026-40996","summary":"Inbound WS-Security allows RSA PKCS#1 v1.5 key transport by default","details":"Wss4jSecurityInterceptor defaulted allowRSA15KeyTransportAlgorithm to true, overriding Apache WSS4J's safer default for validation RequestData. Inbound WS-Security decryption could therefore accept RSA PKCS#1 v1.5 (rsa-1_5) encrypted key material unless operators explicitly reconfigured the flag.\n\nAffected versions:\nSpring Web Services 5.0.0 through 5.0.1; 4.1.0 through 4.1.3; 4.0.0 through 4.0.18; 3.1.0 through 3.1.8.","published":"2026-06-11T05:04:05.227Z","modified":"2026-09-06T11:45:35.247009989Z","cvss":{"score":4.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.00129,"percentile":0.02891,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework.ws:spring-ws-security","fixedVersion":"5.0.2"},{"ecosystem":"Maven","name":"org.springframework.ws:spring-ws-security","fixedVersion":"4.1.4"},{"ecosystem":"Maven","name":"org.springframework.ws:spring-ws-security","fixedVersion":null},{"ecosystem":"Maven","name":"org.springframework.ws:spring-ws-security","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://spring.io/security/cve-2026-40996"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40996.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40996"},{"type":"PACKAGE","url":"https://github.com/spring-projects/spring-ws"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-06T11:45:35.247009989Z"}}