---
title: "CVE-2026-107821: MariaDB Server - Out of Bounds Read/Write"
description: "MariaDB server 10.6.1 to 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2 contains an out-of-bounds read/write vulnerability caused by insufficient validation of FRM metadata when opening binary FRM files, letting attackers with file placement ability crash the server or execute code, exploit requires placing crafted FRM files in data directory."
url: https://panop.io/threat-heartbeat/CVE-2026-107821/
---

# CVE-2026-107821 MariaDB Server - Out of Bounds Read/Write

MariaDB server 10.6.1 to 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2 contains an out-of-bounds read/write vulnerability caused by insufficient validation of FRM metadata when opening binary FRM files, letting attackers with file placement ability crash the server or execute code, exploit requires placing crafted FRM files in data directory.

CVSS base score 8.0 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

EPSS

0.48% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-107821)

## Details

Type

Out of Bounds Read/Write

Impact

Remote Code Execution, Denial Of Service

CVSS vector

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

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-1285](https://cwe.mitre.org/data/definitions/1285.html)

## Vendor fix

Update to versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, or 13.0.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-107821](https://nvd.nist.gov/vuln/detail/CVE-2026-107821)
- [https://github.com/MariaDB/server/commit/3b1c2e58abab5571bec4ff52773ddc75b1738da9](https://github.com/MariaDB/server/commit/3b1c2e58abab5571bec4ff52773ddc75b1738da9)
- [https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13](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-11.8.9)
- [https://github.com/MariaDB/server/security/advisories/GHSA-c4gx-34mg-95q5](https://github.com/MariaDB/server/security/advisories/GHSA-c4gx-34mg-95q5)
- [https://jira.mariadb.org/browse/MDEV-40571](https://jira.mariadb.org/browse/MDEV-40571)
- [https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19](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-10.6.28)
- [https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3](https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3)
- [https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2](https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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