CVE-2026-44171 MariaDB: path traversal in mbstream
A path traversal vulnerability in MariaDB's mbstream allows attackers to write files outside the target directory using a crafted archive.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-44171?
CVE-2026-44171 is a medium-severity path traversal vulnerability in Mariadb Mariadb, published on 12 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
MariaDB server is a community developed fork of MySQL server. From versions 10.6.1 to before 10.6.26, 10.11.1 to before 10.11.17, 11.4.1 to before 11.4.11, 11.8.1 to before 11.8.7, and 12.3.1, mbstream did not check for /../ in the path when unpacking the archive. A proper backup can never contain such paths, but a specially crafted archive could have caused mbstream to create files outside of the target-dir path. This issue has been patched in versions 10.6.26, 10.11.17, 11.4.11, 11.8.7, and 12.3.2.
Weakness: CWE-22
Which versions are affected by CVE-2026-44171?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | From 10.6.1 | 10.6.26, 10.11.17, 11.4.11, 11.8.7, 12.3.2 |
mariadb-min Bitnami | From 10.6.1 | 10.6.26, 10.11.17, 11.4.11, 11.8.7, 12.3.2 |
mysql-client Bitnami | From 10.6.1 | 10.6.26, 10.11.17, 11.4.11, 11.8.7, 12.3.2 |
Products include Mariadb Mariadb.
How do I fix CVE-2026-44171?
Upgrade mariadb to a fixed version for your release line: 10.6.26, 10.11.17, 11.4.11 or 11.8.7.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-44171 being exploited?
There is no known exploitation of CVE-2026-44171 in the wild and no public exploit code.
Other vulnerabilities in Mariadb Mariadb
- CVE-2026-49261 MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`
- CVE-2026-85746 MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
- CVE-2026-85748 MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
- CVE-2026-92262 MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
- CVE-2023-26785 Code injection in n/a
Sources
Also known as ALPINE-CVE-2026-44171, BELL-CVE-2026-44171, BIT-mariadb-2026-44171, BIT-mariadb-min-2026-44171, BIT-mysql-client-2026-44171, CLSA-2026-1786548808 and 11 more.