CVE-2026-44171: MariaDB: path traversal in mbstream

Published Jun 12, 2026
·
Updated

Last updated 11 July 2026

Other sources

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.

— MITRE

Affected Software

7 affected componentsFixes available
MariaDB MariaDB Server>=10.6.1<10.6.26, >=10.11.1<10.11.17, >=11.4.1<11.4.11, >=11.8.1<11.8.7, =12.3.1
MariaDB MariaDB>=10.6.1<10.6.26
MariaDB MariaDB>=10.11.1<10.11.17
MariaDB MariaDB>=11.4.1<11.4.11
MariaDB MariaDB>=11.8.1<11.8.7
MariaDB MariaDB=12.3.1
debian/mariadb<=1:11.8.6-0+deb13u1
1:10.11.18-0+deb12u11:11.8.8-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/mariadb to a version that resolves this vulnerability.

    Fixed in 1:10.11.18-0+deb12u1Fixed in 1:11.8.8-1
  2. Upgrade

    Upgrade MariaDB (mbstream) to a version that resolves this vulnerability.

    Fixed in 10.6.26
  3. Upgrade

    Upgrade MariaDB (mbstream) to a version that resolves this vulnerability.

    Fixed in 10.11.17
  4. Upgrade

    Upgrade MariaDB (mbstream) to a version that resolves this vulnerability.

    Fixed in 11.4.11
  5. Upgrade

    Upgrade MariaDB (mbstream) to a version that resolves this vulnerability.

    Fixed in 11.8.7
  6. Upgrade

    Upgrade MariaDB (mbstream) to a version that resolves this vulnerability.

    Fixed in 12.3.2

Event History

Jun 12, 2026
CVE Published
via MITRE·05:33 PM
Data Sourced
via MITRE·05:33 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:16 PM
DescriptionSeverityWeaknessAffected Software
Jul 15, 2026
Data Sourced
via Ubuntu·01:29 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Launchpad·01:34 PM
Description
Data Sourced
via Debian·01:34 PM
DescriptionAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-44171?

The severity of CVE-2026-44171 is categorized as medium with a score of 6.3.

2

How do I fix CVE-2026-44171?

To mitigate CVE-2026-44171, it is recommended to upgrade to MariaDB versions 10.6.26, 10.11.17, 11.4.11, 11.8.7, or later.

3

What type of vulnerability is CVE-2026-44171?

CVE-2026-44171 is a path traversal vulnerability affecting the mbstream component of MariaDB.

4

Which versions of MariaDB are affected by CVE-2026-44171?

CVE-2026-44171 affects MariaDB 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.

5

What happens if CVE-2026-44171 is exploited?

If exploited, CVE-2026-44171 could allow an attacker to access files outside of the intended directory, potentially leading to unauthorized information disclosure.

Company

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