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CVE Record

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

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.

MediumCVSS 5.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue affects the Trilogy MySQL client library. A malicious database server can send a crafted authentication response that makes the client expose a small amount of uninitialized stack memory. The primary concern is systems that connect to untrusted or compromised MySQL-compatible servers.

Executive priority

Treat as a targeted remediation item, not an emergency. Prioritize internet-adjacent, multi-tenant, or less-controlled environments where database server trust is harder to guarantee.

Technical view

During authentication, trilogy versions before 2.1.1 can read and return up to 12 bytes from an uninitialized stack variable after a specially crafted server authentication packet. The issue is CWE-908, rated CVSS 5.9, and is fixed in trilogy 2.1.1.

Likely exposure

Exposure is likely limited to applications using the trilogy gem before 2.1.1, especially where database endpoints, proxies, or test infrastructure are not fully trusted.

Exploitation context

The source bundle does not show KEV listing or active exploitation evidence. Exploitation requires a malicious or compromised server that the client attempts to authenticate with, which raises practical complexity.

Researcher notes

The advisory identifies a crafted authentication packet from a malicious server as the trigger and names 2.1.1 as the upgrade target. The provided sources do not include exploit details, active exploitation, or broader affected products.

Mitigation direction

  • Upgrade the trilogy gem to version 2.1.1 or later.
  • Only connect trilogy clients to trusted MySQL-compatible servers.
  • Review database endpoint and proxy configuration for unexpected targets.
  • Monitor the GitHub advisory for any updated vendor guidance.

Validation and detection

  • Inventory applications that depend on the trilogy gem.
  • Confirm deployed trilogy versions are 2.1.1 or later.
  • Review connection configuration for untrusted database hosts or proxies.
  • Check dependency lockfiles and build artifacts for vulnerable versions.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-908: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2022-31026 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.9Medium
CVSS 3.1 vector shape for CVE-2022-31026Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
githubtrilogy< 2.1.1Listed
Weakness

CWE details

CWE-908

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-908 · source CWE mapping

Use of Uninitialized Resource

Use of Uninitialized Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs