Description 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. Affected Spring Products and Versions Spring Boot: 4.0.0 - 4.0.5 3.5.0 - 3.5.13 3.4.0 - 3.4.15 3.3.0 - 3.3.18 2.7.0 - 2.7.32 Versions that are no longer supported are also affected. Mitigation Users of affected versions should upgrade to the corresponding fixed version. Affected version(s) Fix version Availability 4.0.x 4.0.6 OSS 3.5.x 3.5.14 OSS 3.4.x 3.4.16 Enterprise Support Only 3.3.x 3.3.19 Enterprise Support Only 2.7.x 2.7.33 Enterprise Support Only No further mitigation steps are necessary. References https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H&version=3.1 History 2026-04-23: Initial vulnerability report published.