CVE-2026-119277
Description
A flaw was found in MariaDB Connector/J. This vulnerability can lead to a Denial of Service (DoS) because packet decoders do not verify that sufficient data remains in the receive buffer before reading server-specified lengths. A compromised database server or an attacker positioned between the client and server can send malformed packets, triggering unexpected exceptions that terminate connection handling.
Statement
Red Hat Product Security rates this vulnerability as Moderate severity because successful exploitation requires an adversary to either control the database backend or perform man-in-the-middle traffic interception, and the resulting impact is confined to a client-side denial of service. Typical Red Hat environments deploy database clients within secured network boundaries, limiting an external attacker's ability to inject malformed server responses. Furthermore, triggering the vulnerability only aborts active connections through unhandled client exceptions, posing no risk to host confidentiality or data integrity.
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)
Confidentiality,Integrity
Technical Impact: Read Memory; Modify Memory; Varies by Context
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