CVE-2026-119279
Description
A flaw was found in MariaDB Connector/J. A malicious or compromised database server, or an attacker intercepting network traffic, can cause a Denial of Service (DoS) by sending crafted responses containing excessively large length values. Because the connector converts these protocol values into signed integers without bounds checking, the values can wrap to negative numbers or trigger oversized memory allocations. This issue causes unhandled exceptions or crashes in client applications during connection handling.
Statement
This vulnerability is rated as Moderate because successful exploitation requires an adversary to either compromise the upstream database server or gain a privileged network position to manipulate traffic as a machine-in-the-middle. In typical Red Hat environments, Java enterprise services communicate with database backends across protected internal networks or encrypted channels, reducing exposure to traffic interception. Furthermore, the impact is confined to client-side denial of service through connection crashes or excess memory allocation, presenting no threat to data integrity or confidentiality.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.9 | N/A | 5.9 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | High |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Other,Integrity
Technical Impact: Unexpected State; Quality Degradation
The program could wind up using the wrong number and generate incorrect results. If the number is used to allocate resources or make a security decision, then this could introduce a vulnerability.
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