Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in Spring Boot - CVE-2026-40975
Published: April 27, 2026
Vulnerability identifier: #VU128234
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-40975
CWE-ID: CWE-338
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Spring
Affected software:
Spring Boot
Spring Boot
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information and compromise integrity of secret-dependent operations.
The vulnerability exists due to the use of a weak pseudorandom number generator in the random value property source when generating values with ${random.value}. A remote attacker can predict generated values to disclose sensitive information and compromise integrity of secret-dependent operations.
${random.uuid} is not affected, and ${random.int} and ${random.long} should never be used for secrets because they are numeric values with a predictable range.
How to mitigate CVE-2026-40975
Install security update from vendor's website.