PT-2026-35545 · Spring · Spring Boot

Published 2026-04-27 · Updated 2026-04-28 · CVE-2026-40973

Mitre

CVSS v3.1

7.0

High

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Weakness Enumeration

CWE-377

Related Identifiers

CVE-2026-40973

Affected Products

Spring Boot

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-40973 · Security Note
• https://spring.io/security/cve-2026-40973 · Note
• https://twitter.com/threatcluster/status/2048862413106114575 · Twitter Post