CVE-2026-40975

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.

CVSS v3.1 Score

4.8

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0005

Probability of exploitation

0.15%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-330 CWE-330

Affected Products

Vendor	Product	Versions
vmware	spring_boot	< 2.7.33
vmware	spring_boot	3.3.0 — 3.3.19
vmware	spring_boot	3.4.0 — 3.4.16
vmware	spring_boot	3.5.0 — 3.5.14
vmware	spring_boot	4.0.0 — 4.0.6

References

Advisories & Patches

https://spring.io/security/cve-2026-40975

Frequently Asked Questions

What is CVE-2026-40975? +

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. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2026-40975? +

CVE-2026-40975 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0005, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40975? +

CVE-2026-40975 affects products from vmware, specifically: spring_boot. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40975? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-7783

Use of Insufficiently Random Values vulnerability in form-data allows HTTP Parameter Pollution (HPP). This vulnerability is associated with program files …

CVE-2025-59371

An authentication bypass vulnerability has been identified in the IFTTT integration feature. A remote, authenticated attacker could leverage this vulnerability …

CVE-2025-13955

Predictable default Wi-Fi Password in Access Point functionality in EZCast Pro II version 1.17478.146 allows attackers in Wi-Fi range to …

CVE-2026-42155

Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform …

CVE-2025-4607 9.8

The PSW Front-end Login & Registration plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and …

CVE-2024-36389 9.8

MileSight DeviceHub - CWE-330 Use of Insufficiently Random Values may allow Authentication Bypass