CVE-2026-107821: MariaDB server is a community developed fork of MySQL server

This month

HIGH 8.0WATCHLISTUPGRADE

CVE-2026-107821 is a high-severity flaw (CVSS 8.0) affecting mariadb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 vers

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-1285
Published	2026-10-09
Last modified	2026-10-14

Publisher (CNA): GitHub, Inc. · Vendor: mariadb

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-09 18:17 UTCPublished CVE record published
2026-10-14 14:13 UTCUpdated Record last modified

mariadb mariadb UPGRADE

Affected: >= 10.6.1 and < 10.6.28 · >= 10.11.1 and < 10.11.19 · >= 11.4.1 and < 11.4.13 · >= 11.8.1 and < 11.8.9 · >= 12.3.1 and < 12.3.3 · >= 13.0.1 and < 13.0.2

Fixed in: 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2

Safe to downgrade to: a release before 10.6.1

1. Check installed version

apt-cache policy mariadb || rpm -q mariadb || mariadb --version

2. UPGRADE to 10.6.28 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mariadb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mariadb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 10.6.1 (Debian / Ubuntu)

apt-cache madison mariadb sudo apt install mariadb=<VERSION_BEFORE_10.6.1> sudo apt-mark hold mariadb

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mariadb sudo dnf downgrade mariadb-<VERSION_BEFORE_10.6.1> sudo dnf versionlock add mariadb

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Official advisories

Amazon Linux 2023 ALAS: ALAS2023-2026-3308 (important): mariadb1011 2026-10-24
Amazon Linux 2023 ALAS: ALAS2023-2026-3309 (important): mariadb114 2026-10-24
Amazon Linux 2023 ALAS: ALAS2023-2026-3310 (important): mariadb118 2026-10-24
Amazon Linux 2023 ALAS: ALAS2023-2026-3311 (important): mariadb123 2026-10-24

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-107821?

mariadb: upgrade to 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2. Exact commands for each OS are on this page.

Is CVE-2026-107821 being exploited?

CVE-2026-107821 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-107821 affect?

CVE-2026-107821 affects mariadb. Severity is high (CVSS 8.0). 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 op

How urgent is CVE-2026-107821?

Priority 50/100. High severity; On your watchlist

Software pages

MySQL vulnerabilities · MariaDB vulnerabilities

Related CVEs

CVE-2026-49261 CRITICAL 10.0 UPGRADE MariaDB server is a community developed fork of MySQL server
CVE-2026-44170 CRITICAL 9.8 UPGRADE MariaDB server is a community developed fork of MySQL server
CVE-2026-44172 CRITICAL 9.1 DOWNGRADE MITIGATE MariaDB server is a community developed fork of MySQL server
CVE-2026-48165 HIGH 8.0 UPGRADE MariaDB server is a community developed fork of MySQL server
CVE-2026-48163 HIGH 8.0 UPGRADE MariaDB server is a community developed fork of MySQL server

References

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