{"id":"CVE-2026-40973","aliases":["GHSA-wwpq-f5c3-7hvx"],"url":"https://o3.security/vulnerability/CVE-2026-40973","summary":"Spring Boot accepts predictable temp directory without ownership verification","details":"A local attacker on the same host as the application may be able to take control of the directory used by `ApplicationTemp`. When `server.servlet.session.persistent` is set to `true` and the attack persists across application restarts, this may allow the attacker to read session information and hijack authenticated users or deploy a gadget chain and execute code as the application's user.\n\nAffected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); predictable temp directory / `ApplicationTemp` ownership verification. Versions that are no longer supported are also affected per vendor advisory.","published":"2026-04-27T23:29:51.946Z","modified":"2026-07-27T03:56:17.071710692Z","cvss":{"score":7,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot","fixedVersion":"4.0.6"},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot","fixedVersion":"3.5.14"},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot","fixedVersion":null},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot","fixedVersion":null},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://spring.io/security/cve-2026-40973"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40973.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40973"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-27T03:56:17.071710692Z"}}