MariaDB Connector/J: Length-encoded integers larger than Integer.MAX_VALUE were truncated before being used as lengths

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-119279
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, 3.4.5, and 3.5.10, the ReadableByteBuf.readLength() and ReadableByteBuf.readIntLengthEncodedNotNull() methods narrowed the protocol's unsigned 8-byte length-encoded integer to a Java int without checking that the value fit a non-negative integer. Values above Integer.MAX_VALUE could wrap to a negative or unrelated length that downstream allocation and read paths used. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger NegativeArraySizeException, out-of-bounds failures, or oversized allocation behavior in client connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.10.

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-130 | CWE-190 | CWE-130 CWE-130: Improper Handling of Length Parameter Inconsistency | CWE-190 CWE-190: Integer Overflow or Wraparound

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
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.5.0, < 3.5.10 Not specified

References

ReferenceSourceLinkTags
github.com/mariadb-corporation/mariadb-connector-j/commit/dbbadc3e215c47... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/bfd9f5ad666a6f... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.10 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.7 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/30d4a883377a9b... [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
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