Is CVE-2026-107818 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107818 being exploited in the wild.

How severe is CVE-2026-107818?

High severity, with a CVSS score of 8.4, published 9 October 2026.

Which products and versions are affected?

Mariadb Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.4.0 to 11.4.12, 11.8.0 to 11.8.8, 12.3.0 to 12.3.2, 13.0.0 to 13.0.1.

Is there a fix for CVE-2026-107818?

Yes: fixed in 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107818 attacked?

It is attacked with local access, in a hosted service.

Am I affected by CVE-2026-107818?

Check whether you run Mariadb or Mariadb Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107818: MariaDB environment injection via wsrep bootstrap in service file

CVE-2026-107818 · Severity: high · CVSS 8.4 · Published 2026-10-09

MariaDB Server, a database server commonly used in web applications and infrastructure, is vulnerable to environment variable injection during cluster bootstrap restarts. A database user with FILE privilege can write a malicious file that gets read during service restart, potentially allowing arbitrary code execution or service compromise.

Technologies: Mariadb, Mariadb Server. Vendors: Mariadb.

Quick answers

Is CVE-2026-107818 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107818 being exploited in the wild.
How severe is CVE-2026-107818?: High severity, with a CVSS score of 8.4, published 9 October 2026.
Which products and versions are affected?: Mariadb Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.4.0 to 11.4.12, 11.8.0 to 11.8.8, 12.3.0 to 12.3.2, 13.0.0 to 13.0.1.
Is there a fix for CVE-2026-107818?: Yes: fixed in 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107818 attacked?: It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-107818?: Check whether you run Mariadb or Mariadb Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

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

Technical details

A local privilege escalation vulnerability exists in MariaDB's systemd service file handling of wsrep (Galera cluster) bootstrap. An authenticated database user with FILE privilege can create a specially-crafted file at /run/mysqld/wsrep-new-cluster, which the service reads and uses to inject environment variables on restart. The vulnerability requires FILE privilege and a permissive secure-file-priv configuration.

Affected products

MariaDB Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.4.0 to 11.4.12, 11.8.0 to 11.8.8, 12.3.0 to 12.3.2, 13.0.0 to 13.0.1

Timeline

2026-10-09: disclosed

References

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