What is CVE-2026-40973?

CVE-2026-40973 is a high-severity vulnerability in Spring Boot, classified under Insecure Temporary File. CVSS score: 7.0/10. Published 2026-04-28.

How severe is CVE-2026-40973?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Spring Boot

CVE-2026-40973

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, thi…

EPSS: 0.000 (0.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Spring Boot — versions 4.0.0, 3.5.0, 3.4.0
Vmware Spring_boot

Weakness classification (CWE)

CWE-377 — Insecure Temporary File

References

security@vmware.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-40973?: CVE-2026-40973 is a high-severity vulnerability in Spring Boot, classified under Insecure Temporary File. CVSS score: 7.0/10. Published 2026-04-28.
How severe is CVE-2026-40973?: High severity. CVSS v3 base score is 7.0 out of 10.