MariaDB Connector/J: Inappropriate Encoding for Output Context in org.mariadb.jdbc:mariadb-java-client
Priority LOW 28CWE-838Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 1 fixed, 14 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.
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, the connector encodes and decodes protocol text and performs client-side escaping under the assumption that the connection character set is UTF-8. The server can report a mid-session change to character_set_client through OK-packet session-state tracking, including a change caused by SET NAMES, a stored routine or trigger, server configuration, or a hostile server. If character_set_client changes to a non-UTF-8 value, the driver continues to read and write UTF-8 while the server interprets the same bytes under another encoding, causing silent data corruption and a client/server charset-confusion mismatch that can defeat byte-wise quoting or escaping. The fix accepts only utf8, utf8mb3, or utf8mb4 after initialization; any other value causes SQLException with SQLState 08000 and closes the connection. This issue is fixed in versions 2.7.14, 3.3.5, 3.4.3, and 3.5.9.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00873 59th percentileScored 2026-11-07
Fix Partial mariadb-connector-j (mariadb-corporation): 2.7.14, 3.3.5, 3.4.3 +1org.mariadb.jdbc:mariadb-java-client (Maven): 2.7.14, 3.3.5, 3.4.3 +1Red Hat: 1 advisoryRed Hat: 1 fixed, 14 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MariaDB | mariadb-connector-j | before 2.7.14; 3.0.0-alpha to before 3.3.5; 3.4.0 to before 3.4.3; 3.5.0 to before 3.5.9 | 2.7.14, 3.3.5, 3.4.3, 3.5.9 | Patch available | CNA |
| — | org.mariadb.jdbc:mariadb-java-client (Maven) | before 2.7.14 | 2.7.14 | Patch available | GHSA-xvr9-35cr-46v9 |
| — | org.mariadb.jdbc:mariadb-java-client (Maven) | 3.0.0 to before 3.3.5 | 3.3.5 | Patch available | GHSA-xvr9-35cr-46v9 |
| — | org.mariadb.jdbc:mariadb-java-client (Maven) | 3.4.0 to before 3.4.3 | 3.4.3 | Patch available | GHSA-xvr9-35cr-46v9 |
| — | org.mariadb.jdbc:mariadb-java-client (Maven) | 3.5.0 to before 3.5.9 | 3.5.9 | Patch available | GHSA-xvr9-35cr-46v9 |
- mariadb-connector-j VendorMariaDB Affected before 2.7.14; 3.0.0-alpha to before 3.3.5; 3.4.0 to before 3.4.3; 3.5.0 to before 3.5.9 Fixed in 2.7.14, 3.3.5, 3.4.3, 3.5.9 Patch available CNA
- org.mariadb.jdbc:mariadb-java-client (Maven) Vendor— Affected before 2.7.14 Fixed in 2.7.14 Patch available GHSA-xvr9-35cr-46v9
- org.mariadb.jdbc:mariadb-java-client (Maven) Vendor— Affected 3.0.0 to before 3.3.5 Fixed in 3.3.5 Patch available GHSA-xvr9-35cr-46v9
- org.mariadb.jdbc:mariadb-java-client (Maven) Vendor— Affected 3.4.0 to before 3.4.3 Fixed in 3.4.3 Patch available GHSA-xvr9-35cr-46v9
- org.mariadb.jdbc:mariadb-java-client (Maven) Vendor— Affected 3.5.0 to before 3.5.9 Fixed in 3.5.9 Patch available GHSA-xvr9-35cr-46v9
Remediation
- Fix · CNA mariadb-connector-j (mariadb-corporation) Fixed in 2.7.14, 3.3.5, 3.4.3, 3.5.9
- Fix · GHSA-xvr9-35cr-46v9 org.mariadb.jdbc:mariadb-java-client (Maven) Fixed in 2.7.14 Advisory →
- Fix · GHSA-xvr9-35cr-46v9 org.mariadb.jdbc:mariadb-java-client (Maven) Fixed in 3.3.5 Advisory →
- Fix · GHSA-xvr9-35cr-46v9 org.mariadb.jdbc:mariadb-java-client (Maven) Fixed in 3.4.3 Advisory →
- Fix · GHSA-xvr9-35cr-46v9 org.mariadb.jdbc:mariadb-java-client (Maven) Fixed in 3.5.9 Advisory →
Red Hat 1 advisory
- RHSA-2026:83082 Released 2026-10-15 · Red Hat rating ImportantRed Hat build of Quarkus 3.27.6 release and security update
- Red Hat build of Quarkus 3.27.6.redhat at.yawk.lz4.lz4-java-1.11.1.rhel8-redhat-00001.jar, com.fasterxml.jackson.core.jackson-core-2.21.7.redhat-00001.jar, com.fasterxml.jackson.core.jackson-databind-2.21.7.redhat-00001.jar +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Pipelines | Affected | No fix yet |
| Red Hat Build of Keycloak | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Fuse 7 | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift GitOps | Affected | No fix planned: Will not fix |
| Red Hat Satellite 6 | Affected | No fix yet: Fix deferred |
| Red Hat Single Sign-On 7 | Affected | No fix planned: Out of support scope |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet |
| Red Hat build of Debezium 3 | Affected | No fix yet: Fix deferred |
| Red Hat build of Quarkus | Affected | No fix yet: Fix deferred |
| Secrets Management Console for Red Hat OpenShift | Affected | No fix yet |
| Red Hat build of Quarkus 3.27.6.redhat | Fixed | RHSA-2026:83082 |
Not affected: 8 products
- OpenShift Service Mesh 3
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
- Red Hat Trusted Artifact Signer
- Red Hat Trusted Profile Analyzer
- Red Hat build of Quarkus 3.27.6.redhat
Timeline
- 2026-10-02 Threatist record created from CVE-2026-55858
- 2026-10-03 Alias added: GHSA-xvr9-35cr-46v9
- 2026-10-08 Affected versions changed · Red Hat
- 2026-10-16 Fix available: RHSA-2026:83082 · Red Hat
- 2026-10-16 Fix available: Red Hat build of Quarkus 3.27.6.redhat · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
References
Other 11
- https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-xvr9-35cr-46v9
- https://github.com/mariadb-corporation/mariadb-connector-j/commit/300716bef1e1d0370a41be7863b88aa2d55fbb69
- https://github.com/mariadb-corporation/mariadb-connector-j/commit/7b3c69221b5463ee03472654040b3f6b9e5329c7
- https://github.com/mariadb-corporation/mariadb-connector-j/commit/8cfd9df697372ad4ed09fe87a34b34babb6d43d6
- https://github.com/mariadb-corporation/mariadb-connector-j/commit/c555c9b477521be0c35c3a5461f9f46681553607
- https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/2.7.14
- https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.5
- https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3
- https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9
- https://jira.mariadb.org/browse/CONJ-1317
- https://github.com/mariadb-corporation/mariadb-connector-j
More MariaDB vulnerabilities
- TI-2023-11776 MariaDB v10.5 was discovered to contain a remote code execution (RCE) vulnerability via… CVSS 3.1CRITICAL 9.8
- TI-2016-05707 Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB… CVSS 3.0CRITICAL 9.8
- TI-2022-00687 Infinite loop in BN_mod_sqrt() reachable when parsing certificates CVSS 3.1HIGH 7.5
- TI-2014-00217 OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly… CVSS 3.1HIGH 7.4
- TI-2014-00188 The dtls1_reassemble_fragment function in d1_both.c in OpenSSL before 0.9.8za, 1.0.0… CVSS 2.0MEDIUM 6.8
- TI-2018-15259 zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if… CVSS 3.1HIGH 7.5
Sources
- CVE-2026-55858 · CVE Program
- CVE-2026-55858 · NVD
- FIRST EPSS
- GHSA-xvr9-35cr-46v9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-55858 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences