CVE-2026-107816 MariaDB: `qc_info` plugin can do OOB reads if query contains \0
An out-of-bounds read in the MariaDB qc_info plugin allows attackers to disclose memory or crash the server via crafted queries.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107816?
CVE-2026-107816 is a medium-severity memory corruption vulnerability in Mariadb Mariadb, published on 9 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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 qc_info plugin could be confused by a query containing embedded null bytes. Reading information_schema.query_cache_info after such a query was cached could access data beyond the end of a heap-allocated buffer, potentially disclosing adjacent memory or crashing the server. 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-2026-107816?
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-2026-107816?
Upgrade mariadb to a fixed version for your release line: 10.6.28, 10.11.19, 11.4.13 or 11.8.9.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-107816 being exploited?
There is no known exploitation of CVE-2026-107816 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-2026-107816, BIT-mariadb-2026-107816, BIT-mariadb-min-2026-107816, BIT-mysql-client-2026-107816, DEBIAN-CVE-2026-107816, ECHO-ee76-63da-e27e and 8 more.