Inappropriate Encoding for Output Context Affecting keycloak package, versions <26.7.2-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-KEYCLOAK-19431160
- published30 Aug 2026
- disclosed28 Aug 2026
Introduced: 28 Aug 2026
NewCVE-2026-55858 (opens in a new tab)How to fix?
Upgrade Minimos:latest keycloak to version 26.7.2-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream keycloak package and not the keycloak package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
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.
References
- https://www.cve.org/CVERecord?id=CVE-2026-55858
- https://github.com/advisories/GHSA-xvr9-35cr-46v9
- https://osv.dev/vulnerability/MINI-ff4p-w6cm-8cpq
- https://osv.dev/vulnerability/CVE-2026-55858
- 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://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-xvr9-35cr-46v9
- https://jira.mariadb.org/browse/CONJ-1317