CVE-2026-107821: mariadb — 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, MariaDB insufficiently validated counts, offsets, lengths, and field boundaries in FRM metadata while opening binary FRM files. An attacker able to place a crafted FRM file in the data directory could trigger out-of-bounds reads or writes, crash the server, or potentially execute code. 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

8.0

HIGH

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

EPSS — Exploit Prediction

0.0076

Probability of exploitation

0.54%

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-1285 CWE-1285

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/3b1c2e58abab5571bec4ff52773ddc75b1738da9 https://github.com/MariaDB/server/security/advisories/GHSA-c4gx-34mg-95q5

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-40571

Frequently Asked Questions

What is CVE-2026-107821? +

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, MariaDB insufficiently validated counts, offsets, lengths, and field boundaries in FRM metadata while opening binary FRM files. An attacker able to place a crafted FRM file in the data directory could trigger out-of-bounds reads or writes, crash the server, or potentially execute code. 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 8.0 (HIGH).

How severe is CVE-2026-107821? +

CVE-2026-107821 has a CVSS v3.1 score of 8.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0076, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-107821? +

CVE-2026-107821 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-2026-107821? +

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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