MariaDB: path traversal in mbstream

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Summary

CVECVE-2026-44171
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-12 18:16:33 UTC
Updated2026-06-12 18:16:33 UTC
DescriptionMariaDB 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.

Risk And Classification

Primary CVSS: v3.1 6.3 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.000120000 probability, percentile 0.017490000 (date 2026-06-13)

Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.3MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED6.3MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA MariaDB Server affected >= 10.6.1, < 10.6.26 Not specified
CNA MariaDB Server affected >= 10.11.1, < 10.11.17 Not specified
CNA MariaDB Server affected >= 11.4.1, < 11.4.11 Not specified
CNA MariaDB Server affected >= 11.8.1, < 11.8.7 Not specified
CNA MariaDB Server affected >= 12.3.1, < 12.3.2 Not specified

References

ReferenceSourceLinkTags
jira.mariadb.org/browse/MDEV-39408 [email protected] jira.mariadb.org
github.com/MariaDB/server/security/advisories/GHSA-9pjh-5hhw-65v9 [email protected] github.com
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