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CVE-2026-40973

HIGH
7
CVSS Score
Published: April 27, 2026 at 11:29 PM UTC
Updated: July 24, 2026 at 09:20 PM UTC
2 products affected across 2 vendorsSpring BootSpring Boot

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Severity
HIGH7
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring Boot· VMware
95%
v < 2.7.333.3.0 ≤ v < 3.3.193.4.0 ≤ v < 3.4.163.5.0 ≤ v < 3.5.144.0.0 ≤ v < 4.0.6
Affected range stops below 2.7.33, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.19, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.4.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.5.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.6, so it looks safe — our inference, not a vendor statement
Spring Boot· Spring
60%
2.7.0 ≤ v < 2.7.333.3.0 ≤ v < 3.3.193.4.0 ≤ v < 3.4.163.5.0 ≤ v < 3.5.144.0.0 ≤ v < 4.0.62.7.03.3.03.4.03.5.04.0.0
Affected range stops below 2.7.33, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.19, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.4.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.5.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://spring.io/security/cve-2026-40973

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7HIGHvmware
Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-377

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