CVE-2026-40975
Spring Boot Weak PRNG for Secrets
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.
INFO
Published Date :
April 28, 2026, 12:16 a.m.
Last Modified :
April 30, 2026, 1:57 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | dcf2e128-44bd-42ed-91e8-88f912c1401d | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Spring Boot to a fixed version.
- Avoid using numeric or predictable values for secrets.
- Use a strong cryptographically secure random number generator.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40975.
| URL | Resource |
|---|---|
| https://spring.io/security/cve-2026-40975 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40975 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40975
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40975 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40975 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (excluding) 4.0.6 *cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:* versions from (including) 3.3.0 up to (excluding) 3.3.19 *cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:* versions from (including) 3.4.0 up to (excluding) 3.4.16 *cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (excluding) 3.5.14 *cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.33 Added Reference Type VMware: https://spring.io/security/cve-2026-40975 Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 28, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Added CWE CWE-330 Added Reference https://spring.io/security/cve-2026-40975