CVE-2019-11808: Ratpack Project Ratpack

Low severity, CVSS 3.7. EPSS: 1.3% chance of exploitation in the next 30 days.

Ratpack versions before 1.6.1 generate a session ID using a cryptographically weak PRNG in the JDK's ThreadLocalRandom. This means that if an attacker can determine a small window for the server start time and obtain a session ID value, they can theoretically determine the sequence of session IDs.

Affected products

• Ratpack Project Ratpack: before 1.6.1 (fixed in 1.6.1)

Published 2019-05-07. Last modified 2026-06-17.