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CVE-2026-119277

MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths

5.9 Medium

MariaDB 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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.35%Unchanged since Oct 30, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.9

MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths

MariaDB 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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Record
CVE-2026-119277
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125, CWE-130
Updated
2026-11-04
EUVDEUVD-2026-113384 5.9

MariaDB 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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Record
EUVD-2026-113384
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-04
NVD 5.9

MariaDB 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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Record
CVE-2026-119277
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125, CWE-130
Updated
2026-11-04
OSV 5.9

MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths

MariaDB 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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Record
CVE-2026-119277
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125, CWE-130
Updated
2026-11-05
OSVDEBIAN-CVE-2026-119277 5.9

MariaDB 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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Record
DEBIAN-CVE-2026-119277
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-04
OSVUBUNTU-CVE-2026-119277 5.9

MariaDB 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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Record
UBUNTU-CVE-2026-119277
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-05
OSVopenSUSE-SU-2026:12401-1 No score

mariadb-java-client-3.5.11-1.1 on GA media

These are all security issues fixed in the mariadb-java-client-3.5.11-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:12401-1
Updated
2026-11-04

Affected products

Affected packages

Affected packages
PackageAffectedFixed
mariadb-connector-java
Debian:12
All versions, plus listed versions
2.7.15-12.7.6-13.5.10-1
None known
mariadb-connector-java
Debian:13
All versions, plus listed versions
2.7.15-12.7.6-13.5.10-1
None known
mariadb-connector-java
Debian:14
All versions, plus listed versions
2.7.15-12.7.6-13.5.10-1
None known
mariadb-connector-java
Ubuntu:18.04:LTS
All versions, plus listed versions
2.3.0-1~18.04
None known
mariadb-connector-java
Ubuntu:20.04:LTS
All versions, plus listed versions
2.4.2-1build22.5.3-1
None known
mariadb-connector-java
Ubuntu:22.04:LTS
All versions, plus listed versions
2.7.2-12.7.4-1
None known
mariadb-connector-java
Ubuntu:24.04:LTS
All versions, plus listed versions
2.7.6-1
None known
mariadb-connector-java
Ubuntu:26.10
All versions, plus listed versions
2.7.6-1build1
None known
mariadb-connector-java
Ubuntu:26.04:LTS
All versions, plus listed versions
2.7.6-12.7.6-1build1
None known
mariadb-java-client
openSUSE:Tumbleweed
From an advisory covering 7 CVEs
before 3.5.11-1.1
3.5.11-1.1

History

History
RecordedChangedSources
affected, factsOSV
affected, aliases, facts, referencesEUVD, NVD, OSV
factsCVE List
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-119277 is a medium vulnerability (CVSS 5.9) in Mariadb-corporation Mariadb-connector-j, published October 29, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. No source names a fixed version.

References

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