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

Affected: MariaDB server

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.

USN-8536-1 — mariadb vulnerabilities

Affected: Ubuntu:26.04:LTS: mariadb

It was discovered that MariaDB did not properly validate parameters supplied by a joiner node during a State Snapshot Transfer using the mariabackup method. An attacker could possibly use this issue to execute arbitrary shell commands on the donor node. (CVE-2026-44168)

It was discovered that MariaDB did not properly enforce the SHOW CREATE ROUTINE privilege when a user obtained access to a stored routine via a role. An authenticated user could possibly use this issue to obtain sensitive information. (CVE-2026-44169)

It was discovered that MariaDB's mbstream utility did not properly validate paths when unpacking archives. An attacker could possibly use this issue to write files outside of the intended target directory. (CVE-2026-44171)

It was discovered that MariaDB's mysql_real_escape_string() function incorrectly handled the big5 character set. An attacker could possibly use this issue to perform SQL injection attacks. (CVE-2026-44172)

It was discovered that MariaDB did not properly check the FILE privilege when the FROM clause of a SELECT ... INTO OUTFILE or SELECT ... INTO DUMPFILE statement contained only subqueries. An authenticated user could possibly use this issue to write files to unintended locations. (CVE-2026-44173)

It was discovered that MariaDB did not properly validate parameters supplied by a joiner node during a State Snapshot Transfer using the rsync method. An attacker could possibly use this issue to execute arbitrary shell commands on the donor nod…

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

USN-8536-1 — mariadb vulnerabilities