CVE-2026-107816: mariadb Out-of-bounds Read — Fix

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.

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CVSS v3.1 Score

6.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L

EPSS — Exploit Prediction

0.0031

Probability of exploitation

0.23%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
mariadb	mariadb	10.6.1 — 10.6.28
mariadb	mariadb	10.11.1 — 10.11.19
mariadb	mariadb	11.4.1 — 11.4.13
mariadb	mariadb	11.8.1 — 11.8.9
mariadb	mariadb	12.3.1 — 12.3.3
mariadb	mariadb	13.0.1 — 13.0.2

References

Advisories & Patches

https://github.com/MariaDB/server/commit/0931994096b84ecc9ffc8eb3517c7e09e6e8631e https://github.com/MariaDB/server/security/advisories/GHSA-wfqg-88r5-55f6

Other References

https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19 https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28 https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13 https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9 https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 https://jira.mariadb.org/browse/MDEV-40670

Frequently Asked Questions

What is CVE-2026-107816? +

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. It has a CVSS v3.1 base score of 6.4 (MEDIUM).

How severe is CVE-2026-107816? +

CVE-2026-107816 has a CVSS v3.1 score of 6.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0031, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-107816? +

CVE-2026-107816 affects products from mariadb, specifically: mariadb. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-107816? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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