Spring Boot Weak PRNG in Random Value Property Source (before 4.0.6)
CVE-2026-40975 Published on April 27, 2026

Values produced by ${random.value} are not suitable for use as secrets. ${random.uuid} is not affected. ${random.int} and ${random.long} should never be used for secrets as they are numeric values with a predictable range. Affected: Spring Boot 4.0.04.0.5 (fix 4.0.6), 3.5.03.5.13 (fix 3.5.14), 3.4.03.4.15 (fix 3.4.16), 3.3.03.3.18 (fix 3.3.19), 2.7.02.7.32 (fix 2.7.33); random value property source / weak PRNG for secrets. Versions that are no longer supported are also affected per vendor advisory.

NVD

Vulnerability Analysis

CVE-2026-40975 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
LOW
Availability Impact:
NONE

Weakness Types

Use of Insufficiently Random Values

The software uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. When software generates predictable values in a context requiring unpredictability, it may be possible for an attacker to guess the next value that will be generated, and use this guess to impersonate another user or access sensitive information.

What is a PRNG Vulnerability?

The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

CVE-2026-40975 has been classified to as a PRNG vulnerability or weakness.


Products Associated with CVE-2026-40975

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-40975 are published in these products:

VMware Spring Framework
 
Red Hat Apache Camel Hawtio
 
Red Hat Jboss Data Grid
 
Red Hat Openshift Devspaces
 
Red Hat Apache Camel Spring Boot
 
Red Hat Amq Clients
 
Red Hat Optaplanner
 
Red Hat Jboss Fuse
 
Red Hat Amq Broker
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Jboss Enterprise Application Platform
 
Red Hat Jbosseapxp
 
Red Hat Jboss Enterprise Bpms Platform
 
Red Hat Single Sign On
 

Affected Versions

Spring Boot: Red Hat HawtIO HawtIO 4.4.0: Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14: Red Hat Data Grid 8.6.1: Red Hat OpenShift Dev Spaces 3.28: Red Hat OpenShift Dev Spaces 3.28: Red Hat AMQ Broker 7: Red Hat AMQ Clients: Red Hat build of OptaPlanner 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat Fuse 7: Red Hat JBoss Enterprise Application Platform 7: Red Hat JBoss Enterprise Application Platform 8: Red Hat JBoss Enterprise Application Platform Expansion Pack: Red Hat Process Automation 7: Red Hat Single Sign-On 7:

Exploit Probability

EPSS
0.21%
Percentile
11.28%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.