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CVE-2026-44171 MariaDB CVE debrief

CVE-2026-44171 is a path traversal vulnerability in MariaDB server, a community-developed fork of MySQL server. The vulnerability affects 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. The issue arises from the mbstream component not checking for /../ in the path when unpacking an archive, potentially allowing a specially crafted archive to create files outside of the target directory.

Vendor
MariaDB
Product
server
CVSS
MEDIUM 6.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-16
Advisory published
2026-06-12
Advisory updated
2026-06-16

Who should care

Users of MariaDB server 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 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability has a CVSS score of 6.3 and is classified as MEDIUM severity. The affected versions of MariaDB server are 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. The vulnerability is caused by the mbstream component not properly checking for /../ in the path when unpacking an archive.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to MariaDB server versions 10.6.26, 10.11.17, 11.4.11, 11.8.7, or 12.3.2, which have patched this vulnerability.
  • Ensure that backups are properly validated and do not contain malicious paths.

Evidence notes

The CVE record [cve-org] and NVD detail [nvd] provide official information about the vulnerability. Additional references can be found at [ref-4] and [ref-5].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44171 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44171

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44171 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44171

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.