Observable Timing Discrepancy
CVE-2026-40972
Summary
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. This Affects Spring Boot versions prior to 3.5.14, 4.0.x prior to 4.0.6, and 4.1.x prior to 4.1.0-RC1. DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory.
- HIGH
- ADJACENT_NETWORK
- HIGH
- UNCHANGED
- NONE
- NONE
- HIGH
- HIGH
CWE-208 - Observable Timing Discrepancy
Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
Advisory Timeline
- Published