MariaDB Connector/J: Inappropriate Encoding for Output Context in org.mariadb.jdbc:mariadb-java-client
Summary
| CVE | CVE-2026-55858 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-28 23:17:08 UTC |
| Updated | 2026-08-28 23:17:08 UTC |
| Description | 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. |
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:H/A:N
Problem Types: CWE-838 | CWE-838 CWE-838: Inappropriate Encoding for Output Context
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| 3.1 | CNA | DECLARED | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Mariadb-corporation | Mariadb-connector-j | affected < 2.7.14 | Not specified |
| CNA | Mariadb-corporation | Mariadb-connector-j | affected >= 3.0.0-alpha, < 3.3.5 | Not specified |
| CNA | Mariadb-corporation | Mariadb-connector-j | affected >= 3.4.0, < 3.4.3 | Not specified |
| CNA | Mariadb-corporation | Mariadb-connector-j | affected >= 3.5.0, < 3.5.9 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| jira.mariadb.org/browse/CONJ-1317 | [email protected] | jira.mariadb.org | |
| github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.5 | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/commit/c555c9b477521b... | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3 | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/commit/7b3c69221b5463... | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/commit/8cfd9df697372a... | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/security/advisories/G... | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9 | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/releases/tag/2.7.14 | [email protected] | github.com | |
| github.com/mariadb-corporation/mariadb-connector-j/commit/300716bef1e1d0... | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.