A local attacker on the same host as the application may be able to take control of the directory used by `ApplicationTemp`.

Summary

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 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.

Timeline

1. Apr 27, 2026, 11:29 PM UTCCVE published
2. Apr 28, 2026, 12:00 AM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Apr 29, 2026, 3:55 AM UTCRecord last updated

Affected versions

• Spring Spring Boot

  From 4.0.0 · fixed in 4.0.6; From 3.5.0 · fixed in 3.5.14; From 3.4.0 · fixed in 3.4.16; From 3.3.0 · fixed in 3.3.19; From 2.7.0 · fixed in 2.7.33

• org.springframework.boot:spring-bootMaven

  From 4.0.0 · fixed in 4.0.6

• org.springframework.boot:spring-bootMaven

  From 3.5.0 · fixed in 3.5.14

• org.springframework.boot:spring-bootMaven

  From 3.4.0 · through 3.4.15

• org.springframework.boot:spring-bootMaven

  From 3.3.0 · through 3.3.18

• org.springframework.boot:spring-bootMaven

  through 2.7.32

References 1