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, 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.

Published: 2026-04-28 Last update: 2026-04-30 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-40973 is rated Low Risk (29/100): CVSS High severity, with low exploitation likelihood (EPSS 0.13%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-40973

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.01% 0.13% +0.11%
2 2026-04-28 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-40973

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.0 3.1 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.0 5.9 [email protected]

Weakness enumeration for CVE-2026-40973

GitHub Security Advisory for CVE-2026-40973

GHSA-wwpq-f5c3-7hvx · Severity: high · Ecosystem: maven — Spring Boot accepts predictable temp directory without ownership verification

Affected software / configurations for CVE-2026-40973

Vendor Product Version Raw CPE
vmware spring_boot < 2.7.33 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
vmware spring_boot >= 3.3.0, < 3.3.19 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
vmware spring_boot >= 3.4.0, < 3.4.16 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
vmware spring_boot >= 3.5.0, < 3.5.14 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
vmware spring_boot >= 4.0.0, < 4.0.6 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*

References for CVE-2026-40973

cvelogic Threat Intelligence