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CVE-2026-40972

35
FAUCET Score

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.

First published: Apr 27, 2026Last modified: Apr 29, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 2.7.33CPE matchmatch criteria
cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
>= 3.3.0, < 3.3.19CPE matchmatch criteria
cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
>= 3.4.0, < 3.4.16CPE matchmatch criteria
cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
>= 3.5.0, < 3.5.14CPE matchmatch criteria
cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.6CPE matchmatch criteria
cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.26%
Probability of exploitation in next 30 days
EPSS Percentile
17.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0026 is in the 24th percentile among its peer group of 239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

mavenpatch availablevia ghsa
Product: org.springframework.boot:spring-boot-devtoolsFixed in: 4.0.6
mavenpatch availablevia ghsa
Product: org.springframework.boot:spring-boot-devtoolsFixed in: 3.5.14

Vendor Advisories (1)

mavenGHSA-56v8-86gj-66jphigh

Spring Boot DevTools remote secret comparison is vulnerable to timing attacks

Apr 28, 2026

References

spring.io / security/cve-2026-40972
Vendor Advisory