CVE-2026-40975 Spring Boot's random value property source uses a weak PRNG unsuitable for secrets
Developers using Spring Boot random value properties for secrets risk exposure due to predictable PRNG output, requiring upgrades to secure versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40975?
CVE-2026-40975 is a medium-severity vulnerability in Spring Boot, published on 27 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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 4.0.0–4.0.5 (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); random value property source / weak PRNG for secrets. Versions that are no longer supported are also affected per vendor advisory.
Which versions are affected by CVE-2026-40975?
10 open source packages ship an affected version, including org.springframework.boot:spring-boot-cassandra. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework.boot:spring-boot-cassandra Maven | All versions to 2.7.32 | None |
org.springframework.boot:spring-boot-cassandra Maven | All versions to 2.7.32 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.3.0 to 3.3.18 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.3.0 to 3.3.18 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.4.0 to 3.4.15 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.4.0 to 3.4.15 | None |
4 more packages
org.springframework.boot:spring-boot-cassandra Maven | From 3.5.0 | 3.5.14 |
org.springframework.boot:spring-boot-cassandra Maven | From 3.5.0 | 3.5.14 |
org.springframework.boot:spring-boot-cassandra Maven | From 4.0.0 | 4.0.6 |
org.springframework.boot:spring-boot-cassandra Maven | From 4.0.0 | 4.0.6 |
Products include Vmware Spring Boot.
How do I fix CVE-2026-40975?
Upgrade org.springframework.boot:spring-boot-cassandra to a fixed version for your release line: 3.5.14 or 4.0.6.
Is CVE-2026-40975 being exploited?
There is no known exploitation of CVE-2026-40975 in the wild and no public exploit code.
Other vulnerabilities in Spring Boot
- CVE-2023-20873 Spring Boot Security Bypass with Wildcard Pattern Matching on Cloud Foundry
- CVE-2026-40976 Spring Boot's default security filter chain has no authorization rule with Actuator but without Health
- CVE-2026-22731 Authentication Bypass under Actuator Health groups paths
- CVE-2026-22733 Authentication Bypass under Actuator CloudFoundry endpoints
- CVE-2022-27772 Temporary Directory Hijacking to Local Privilege Escalation Vulnerability in org.springframework.boot:spring-boot
Sources
Also known as GHSA-m4x9-hx6x-2c43.