MariaDB Connector/J: Rogue server can crash the client during caching_sha2_password authentication

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-119278
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-29 21:17:21 UTC
Updated2026-10-29 21:17:21 UTC
DescriptionMariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases. From 3.0.0 until 3.3.7 and 3.4.5, during caching_sha2_password authentication, the authentication-more-data response was treated as a length-encoded byte array, memory was allocated from the server-declared length, and authResult[0] was accessed without ensuring a byte existed. A malicious or compromised server, or a machine-in-the-middle attacker, could declare a very large length or send an empty response before any password was transmitted. The malformed packet could cause excessive allocation or an unchecked ArrayIndexOutOfBoundsException escaping from DriverManager.getConnection(). This issue is fixed in versions 3.3.7 and 3.4.5.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

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

Problem Types: CWE-129 | CWE-789 | CWE-129 CWE-129: Improper Validation of Array Index | CWE-789 CWE-789: Memory Allocation with Excessive Size Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.0.0, < 3.3.7 Not specified
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.4.0, < 3.4.5 Not specified

References

ReferenceSourceLinkTags
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.7 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/1e32b7010485f0... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.5 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/security/advisories/G... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/86a90b0dc9746a... [email protected] github.com
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