CVE-2026-40972CWE-208

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

High · published April 27, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
24.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00325 · 24.4th percentile
Weakness
CWE-208 · Observable Timing Discrepancy
Published
2026-04-27T23:15Z
EPSS history
Timeline
  • 27 APR 23:15Z
    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
    cvelistv5