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THREAT OPS › Threat News › [GHSA] GHSA-5rqc-86vf-g8r2 (medium) — org.mariadb:r2dbc-mariadb has Inappropriate Encoding for Output Context and Improper Encoding or Escaping of Output

[GHSA] GHSA-5rqc-86vf-g8r2 (medium) — org.mariadb:r2dbc-mariadb has Inappropriate Encoding for Output Context and Improper Encoding or Escaping of Output

medgithub_advisoriesPublished 2026-08-28

GHSA-5rqc-86vf-g8r2 Severity: medium CVE: CVE-2026-55859

org.mariadb:r2dbc-mariadb has Inappropriate Encoding for Output Context and Improper Encoding or Escaping of Output

### Summary

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

Indicators of compromise

CVE-2026-55859cve

Original source: https://github.com/advisories/GHSA-5rqc-86vf-g8r2