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Fencer Vulns
medium 5.9

CVE-2026-55857 json

MariaDB Connector/J: Cleartext Transmission of Sensitive Information and Insufficiently Protected Credentials

published 2026-08-28 2 mo ago modified 2026-09-10 1 mo ago also GHSA-qxvw-fvwx-5cp7 , EUVD-2026-68020

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 33%
public exploits
0
none known

Summary

MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases. Prior to 2.7.14, 3.3.5, 3.4.3, and 3.5.9, PAM dialog authentication can be coerced into transmitting the account password over an insecure connection. The mysql_clear_password plugin is gated behind a secure transport, but the sibling PAM handler SendPamAuthPacketFactory, named dialog by the server, does not declare that requirement and inherits the default secure-required value false; older branches implement the same affected behavior in SendPamAuthPacket. A hostile or man-in-the-middle server can send an Authentication Switch Request for dialog over plain TCP, causing the driver to return the user's password in cleartext when sslMode=DISABLE and restrictedAuth=null, which is the default configuration. Properly verified TLS and local Unix sockets are not exposed to this transport vector. This issue is fixed in versions 2.7.14, 3.3.5, 3.4.3, and 3.5.9.

Patch / fix

  • maven org.mariadb.jdbc:mariadb-java-client 2.7.14, 3.3.5, 3.4.3, 3.5.9

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-2026-55857 updated cvss 5.9

org.mariadb.jdbc/mariadb-java-client: MariaDB Connector/J: Information Disclosure via Insecure PAM Dialog Authentication

  • Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-ui-rhel9, openshift-pipelines/pipelines-console-plugin-rhel8, openshift-pipelines/pipelines-console-plugin-rhel9, openshift-pipelines/pipelines-console-plugin-pf5-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat build of Debezium 3 mariadb-java-client 3.5.3.redhat-00001 Red Hat Build of Keycloak rhbk/keycloak-rhel9, keycloak/rhbk-openshift-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
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Fuse 7 mariadb-java-client 3.5.3.redhat-00001
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-trustyai-service-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift GitOps microshift-gitops, openshift-gitops-argocd-cli, openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Satellite 6 candlepin, candlepin-selinux
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Single Sign-On 7 mariadb-java-client 3.5.3.redhat-00001
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Secrets Management Console for Red Hat OpenShift external-secrets-management/console-plugin-rhel9
    affected: workaround, no fix available
show 3 more
  • Red Hat build of Quarkus 3.27.6.redhat mariadb-java-client 3.5.9.redhat-00001
    fixed: vendor fix RHSA-2026:83082
  • Red Hat OpenShift Service Mesh 3 openshift-service-mesh/kiali-rhel9-operator Red Hat build of Quarkus 3.27.6.redhat jna 5.8.0, db2 1.21.4, h2 2.3.230, y18n 5.0.8, cliui 8.0.1, guice 5.1.0, +1009 more Red Hat Enterprise Linux 8 Judy, galera, grafana, mariadb, mozjs60, mariadb-pam, +23 more Red Hat Enterprise Linux 9 npm, nodejs, grafana, nodejs-libs, grafana-selinux, nodejs-full-i18n Red Hat Enterprise Linux 10 grafana, nodejs22, nodejs24, nodejs26 Red Hat Hardened Images yarnpkg, nodejs20, nodejs22, nodejs24, nodejs25, nodejs26, +7 more
    +1 more products
    Red Hat Trusted Artifact Signer rhtas/rhtas-console-ui-rhel9
    not affected: vulnerable code not present
  • Red Hat Trusted Profile Analyzer rhtpa/rhtpa-rhel10, rhtpa/rhtpa-trustification-service-rhel9
    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
2 mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% 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:H/I:N/A:N
GitHub 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.mariadb.jdbc:mariadb-java-client
<2.7.14
>=3.0.0, <3.3.5
>=3.4.0, <3.4.3
>=3.5.0, <3.5.9
2.7.14
3.3.5
3.4.3
3.5.9

Affected products

  • mariadb-corporation mariadb-connector-j

Classification

Weakness
  • CWE-319 Cleartext Transmission of Sensitive Information
  • CWE-522 Insufficiently Protected Credentials

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.