{"id":"CVE-2023-20861","aliases":["GHSA-564r-hj7v-mcr5"],"url":"https://o3.security/vulnerability/CVE-2023-20861","summary":"Spring Framework vulnerable to denial of service via specially crafted SpEL expression","details":"In Spring Framework versions 6.0.0 - 6.0.6, 5.3.0 - 5.3.25, 5.2.0.RELEASE - 5.2.22.RELEASE, and older unsupported versions, it is possible for a user to provide a specially crafted SpEL expression that may cause a denial-of-service (DoS) condition.","published":"2023-03-23T00:00:00Z","modified":"2026-07-15T01:49:14.538875665Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework:spring-expression","fixedVersion":"6.0.7"},{"ecosystem":"Maven","name":"org.springframework:spring-expression","fixedVersion":"5.3.26"},{"ecosystem":"Maven","name":"org.springframework:spring-expression","fixedVersion":"5.2.23.RELEASE"}],"fix":null,"references":[{"type":"WEB","url":"https://spring.io/security/cve-2023-20861"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/20xxx/CVE-2023-20861.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-20861"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230420-0007/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:14.538875665Z"}}