Vulnerability · Published Oct 9, 2026 · Assigned by GitHub_M

CVE-2026-107816MariaDB: `qc_info` plugin can do OOB reads if query contains \0

Medium 6.4

In plain English

A medium-severity out-of-bounds read in server from MariaDB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.3%top 71.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	mariadb	no fix listed	DEBIAN-CVE-2026-107816
Debian:13	mariadb	no fix listed	DEBIAN-CVE-2026-107816
Debian:14	mariadb	1:11.8.9+ds-1	DEBIAN-CVE-2026-107816
Ubuntu:24.04:LTS	mariadb	no fix listed	UBUNTU-CVE-2026-107816
Ubuntu:26.04:LTS	mariadb	no fix listed	UBUNTU-CVE-2026-107816
Ubuntu:26.10	mariadb	no fix listed	UBUNTU-CVE-2026-107816
Ubuntu:22.04:LTS	mariadb-10.6	no fix listed	UBUNTU-CVE-2026-107816

Affected products (as reported)

Vendor	Product	Versions
MariaDB	server	>= 10.6.1, < 10.6.28>= 10.11.1, < 10.11.19>= 11.4.1, < 11.4.13>= 11.8.1, < 11.8.9>= 12.3.1, < 12.3.3>= 13.0.1, < 13.0.2

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L

References

https://github.com/MariaDB/server/security/advisories/GHSA-wfqg-88r5-55f6 x_refsource_CONFIRM
https://github.com/MariaDB/server/commit/0931994096b84ecc9ffc8eb3517c7e09e6e8631e x_refsource_MISC
https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19 x_refsource_MISC
https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28 x_refsource_MISC
https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13 x_refsource_MISC
https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9 x_refsource_MISC
https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 x_refsource_MISC
https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 x_refsource_MISC
https://jira.mariadb.org/browse/MDEV-40670 x_refsource_MISC