CVE-2026-40973

State: Published
Severity: 7.0 High
Published: Apr 27, 2026
Updated: Apr 29, 2026
Reserved: Apr 16, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	vmware

Weaknesses

CWE-377 Insecure Temporary File

Affected Products

Product	Versions
Spring BootSpring	4.0.0 to before 4.0.6Affected 3.5.0 to before 3.5.14Affected 3.4.0 to before 3.4.16Affected 3.3.0 to before 3.3.19Affected 2.7.0 to before 2.7.33Affected

References

https://spring.io/security/cve-2026-40973

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