Ratpack versions before 1.6.1 generate a session ID using a cryptographically weak PRNG…
Priority LOW 20CWE-338Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
EPSS 0.01315 70th percentileScored 2026-11-07
Fix Fixed io.ratpack:ratpack-session (Maven): 1.6.1io.ratpack:ratpack-java (Maven): 1.6.1+1 more product
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | io.ratpack:ratpack-session (Maven) | before 1.6.1 | 1.6.1 | Patch available | GHSA-54mg-vgrp-mwx9 |
| — | io.ratpack:ratpack-java (Maven) | before 1.6.1 | 1.6.1 | Patch available | GHSA-54mg-vgrp-mwx9 |
| — | io.ratpack:ratpack-groovy (Maven) | before 1.6.1 | 1.6.1 | Patch available | GHSA-54mg-vgrp-mwx9 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- io.ratpack:ratpack-session (Maven) Vendor— Affected before 1.6.1 Fixed in 1.6.1 Patch available GHSA-54mg-vgrp-mwx9
- io.ratpack:ratpack-java (Maven) Vendor— Affected before 1.6.1 Fixed in 1.6.1 Patch available GHSA-54mg-vgrp-mwx9
- io.ratpack:ratpack-groovy (Maven) Vendor— Affected before 1.6.1 Fixed in 1.6.1 Patch available GHSA-54mg-vgrp-mwx9
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ratpack_project:ratpack:*:*:*:*:*:*:*:* | before 1.6.1 | Vulnerable | Ratpack Project |
- cpe:2.3:a:ratpack_project:ratpack:*:*:*:*:*:*:*:* Versions before 1.6.1 Vulnerable ·Ratpack Project
Remediation
- Fix · GHSA-54mg-vgrp-mwx9 io.ratpack:ratpack-session (Maven) Fixed in 1.6.1 Advisory →
- Fix · GHSA-54mg-vgrp-mwx9 io.ratpack:ratpack-java (Maven) Fixed in 1.6.1 Advisory →
- Fix · GHSA-54mg-vgrp-mwx9 io.ratpack:ratpack-groovy (Maven) Fixed in 1.6.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2019-11808
- 2026-10-03 Alias added: GHSA-54mg-vgrp-mwx9
References
More Ratpack Project Ratpack vulnerabilities
- TI-2021-10198 Remote Code Execution Vulnerability in Session Storage CVSS 3.1CRITICAL 9.9
- TI-2019-13058 An issue was discovered in Ratpack before 1.7.5. CVSS 3.1HIGH 7.5
- TI-2021-10194 Client side sessions should not allow unencrypted storage CVSS 3.1HIGH 7.5
- TI-2021-10192 Cached redirect poisoning via X-Forwarded-Host header CVSS 3.1HIGH 7.0
- TI-2021-10193 Default client side session signing key is highly predictable CVSS 3.1MEDIUM 4.4
Sources
- CVE-2019-11808 · CVE Program
- CVE-2019-11808 · NVD
- FIRST EPSS
- GHSA-54mg-vgrp-mwx9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences