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CVE-2019-11808

17
FAUCET Score

CVE-2019-11808 affects Ratpack versions prior to 1.6.1, stemming from its use of a cryptographically weak pseudo-random number generator (PRNG) for session ID generation. This vulnerability, rated as Low severity (CVSS 3.7), allows a remote attacker with high attack complexity to potentially predict session IDs if they can narrow down the server's start time and obtain an existing session ID. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.6.1CPE matchmatch criteria
cpe:2.3:a:ratpack_project:ratpack:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

3.7LOW

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0132 is in the 52nd percentile among its peer group of 1,505 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: io.ratpack:ratpack-sessionFixed in: 1.6.1
mavenpatch availablevia ghsa
Product: io.ratpack:ratpack-javaFixed in: 1.6.1
mavenpatch availablevia ghsa
Product: io.ratpack:ratpack-groovyFixed in: 1.6.1

Vendor Advisories (1)

mavenGHSA-54mg-vgrp-mwx9low

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in Ratpack

May 14, 2019

References

github.com / ratpack/ratpack/commit/f2b63eb82dd71194319fd3945f5edf29b8f3a42d
PatchThird Party Advisory
github.com / ratpack/ratpack/issues/1448
PatchThird Party Advisory
github.com / ratpack/ratpack/releases/tag/v1.6.1
Release NotesThird Party Advisory