Vulnerability · Published Apr 27, 2026 · Assigned by vmware
CVE-2026-40973
High 7.0
In plain English
A high-severity security flaw in Spring Boot from Spring. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.springframework.boot:spring-boot | 4.0.6 | GHSA-wwpq-f5c3-7hvx |
| Maven | org.springframework.boot:spring-boot | 3.5.14 | GHSA-wwpq-f5c3-7hvx |
| Maven | org.springframework.boot:spring-boot | no fix listed | GHSA-wwpq-f5c3-7hvx |
| Maven | org.springframework.boot:spring-boot | no fix listed | GHSA-wwpq-f5c3-7hvx |
| Maven | org.springframework.boot:spring-boot | no fix listed | GHSA-wwpq-f5c3-7hvx |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Spring | Spring Boot | 4.0.0 – before 4.0.63.5.0 – before 3.5.143.4.0 – before 3.4.163.3.0 – before 3.3.192.7.0 – before 2.7.33 |
Weakness: CWE-377 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H