CVE-2026-107817 MariaDB: mysql_json plugin OOB reads
Attackers can cause out-of-bounds reads leading to information disclosure or server crashes by importing tables with invalid JSON data into MariaDB.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-107817?
CVE-2026-107817 is a medium-severity vulnerability in Mariadb Mariadb, published on 9 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, the mysql_json plugin assumed that imported MySQL tables contained valid MySQL binary JSON data. A specially prepared MySQL table containing invalid JSON data could cause out-of-bounds reads, information disclosure, or a server crash. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.
Weakness: CWE-125
Which versions are affected by CVE-2026-107817?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
mariadb-min Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
mysql-client Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
Products include Mariadb Mariadb.
How do I fix CVE-2026-107817?
Upgrade mariadb to a fixed version for your release line: 10.6.28, 10.11.19, 11.4.13 or 11.8.9.
Is CVE-2026-107817 being exploited?
There is no known exploitation of CVE-2026-107817 in the wild and no public exploit code.
Other vulnerabilities in Mariadb Mariadb
- CVE-2026-49261 MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`
- CVE-2026-85746 MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
- CVE-2026-85748 MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
- CVE-2026-92262 MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
- CVE-2023-26785 Code injection in n/a
Sources
Also known as BELL-CVE-2026-107817, BIT-mariadb-2026-107817, BIT-mariadb-min-2026-107817, BIT-mysql-client-2026-107817, DEBIAN-CVE-2026-107817, ECHO-d78e-57e8-ba31 and 8 more.