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Fencer Vulns
medium 5.9

CVE-2026-119278 json

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

published 2026-10-29 10 d ago modified 2026-10-30 9 d ago also EUVD-2026-113385

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

MariaDB 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.

Patch / fix

  • mariadb-connector-java Debian 14 3.5.10-1

debian advisories DEBIAN-CVE-2026-119278

  • mariadb-java-client openSUSE Tumbleweed 3.5.11-1.1

opensuse advisories openSUSE-SU-2026:12401-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-119278 updated cvss 5.9

org.mariadb.jdbc/mariadb-java-client: MariaDB Connector/J: Denial of Service via malformed authentication response

  • Red Hat build of Debezium 3 mariadb-java-client 3.5.3.redhat-00001 Red Hat Build of Keycloak rhbk/keycloak-rhel9, mariadb-java-client 3.5.3.redhat-00001 Red Hat build of Quarkus mariadb-java-client 3.5.3.redhat-00001 Red Hat Enterprise Linux 8 Judy, galera, mariadb, mariadb-pam, mariadb-test, mariadb-backup, +8 more Red Hat Enterprise Linux 9 mariadb-java-client 3.4.0-2.el10 Red Hat Enterprise Linux 10 mariadb-java-client 3.4.0-2.el10
    +1 more products
    Red Hat OpenShift AI (RHOAI) rhoai/odh-trustyai-service-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenStack Platform 13 (Queens) mariadb, mariadb-libs, mariadb-test, mariadb-common, mariadb-config, mariadb-errmsg, +3 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Satellite 6 candlepin, candlepin-selinux
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images mariadb10.11 10.11.18-4.1.2.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9 d ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • mariadb-corporation mariadb-connector-j

Classification

Weakness
  • CWE-129 Improper Validation of Array Index
  • CWE-789 Memory Allocation with Excessive Size Value

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.