PT-2026-35540 · Spring · Spring Boot

Published 2026-04-27 · Updated 2026-04-28 · CVE-2026-40972

NVD

CVSS v3.1

7.5

High

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

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.

Fix

Weakness Enumeration

CWE-208

Related Identifiers

CVE-2026-40972

Affected Products

Spring Boot

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-40972 · Security Note
• https://spring.io/security/cve-2026-40972 · Note
• https://twitter.com/threatcluster/status/2048862413106114575 · Twitter Post