CVE-2026-55859: org.mariadb:r2dbc-mariadb has Inappropriate Encoding for Output Context and Improper Encoding or Escaping of Output
The connector encodes and decodes all character data assuming the connection character set is UTF-8. A server can change character_set_client mid-session to a non-UTF-8 charset, after which the driver and server interpret the same bytes under different encodings, causing silent data corruption and a client/server charset-confusion mismatch.
References
- github.com/advisories/GHSA-5rqc-86vf-g8r2
- github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/38bad9afebc6c581a853656a42f9ebf403b1b1b7
- github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1
- github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-5rqc-86vf-g8r2
- jira.mariadb.org/browse/R2DBC-124
- nvd.nist.gov/vuln/detail/CVE-2026-55859
Code Behaviors & Features
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