CVE-2026-40972
Published:April 27, 2026
Updated:May 15, 2026
An attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application.
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); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory.
Affected Packages
https://github.com/spring-projects/spring-boot.git (GITHUB):
Affected version(s) >=v3.4.0 <v3.4.16Fix Suggestion:
Update to version v3.4.16https://github.com/spring-projects/spring-boot.git (GITHUB):
Affected version(s) >=v3.3.0 <v3.3.19Fix Suggestion:
Update to version v3.3.19https://github.com/spring-projects/spring-boot.git (GITHUB):
Affected version(s) >=v4.0.0 <v4.0.6Fix Suggestion:
Update to version v4.0.6https://github.com/spring-projects/spring-boot.git (GITHUB):
Affected version(s) >=v3.5.0 <v3.5.14Fix Suggestion:
Update to version v3.5.14https://github.com/spring-projects/spring-boot.git (GITHUB):
Affected version(s) >=v2.7.0 <v2.7.33Fix Suggestion:
Update to version v2.7.33org.springframework.boot:spring-boot-devtools (JAVA):
Affected version(s) >=4.0.0 <4.0.6Fix Suggestion:
Update to version 4.0.6org.springframework.boot:spring-boot-devtools (JAVA):
Affected version(s) >=3.3.0 <3.3.19Fix Suggestion:
Update to version 3.3.19org.springframework.boot:spring-boot-devtools (JAVA):
Affected version(s) >=3.4.0 <3.4.16Fix Suggestion:
Update to version 3.4.16org.springframework.boot:spring-boot-devtools (JAVA):
Affected version(s) >=2.7.0 <2.7.33Fix Suggestion:
Update to version 2.7.33org.springframework.boot:spring-boot-devtools (JAVA):
Affected version(s) >=3.5.0 <3.5.14Fix Suggestion:
Update to version 3.5.14Related Resources (1)
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Contact UsCVSS v4
Base Score:
7.7
Attack Vector
ADJACENT
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Observable Timing Discrepancy
EPSS
Base Score:
0.12