MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ST_AsText can write beyond an allocated output buffer when converting deeply nested GeometryCollections because recursive WKT serialization does not account for bytes consumed or reserve sufficient space. A low-privileged remote attacker can submit a specially crafted GIS object to corrupt memory and potentially achieve code execution when combined with another vulnerability. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
MariaDB server affected
Version Status Constraints
>= 10.6.1, < 10.6.28 affected —
>= 10.11.1, < 10.11.19 affected —
>= 11.4.1, < 11.4.13 affected —
>= 11.8.1, < 11.8.9 affected —
>= 12.3.1, < 12.3.3 affected —
>= 13.0.1, < 13.0.2 affected —

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/MariaDB/server/commit/5c04ca5524385356ff7cf84974a7d491974c1f85 cve-icon cve-icon
https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19 cve-icon cve-icon
https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28 cve-icon cve-icon
https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13 cve-icon cve-icon
https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9 cve-icon cve-icon
https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 cve-icon cve-icon
https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 cve-icon cve-icon
https://github.com/MariaDB/server/security/advisories/GHSA-8fvj-c57c-pggx cve-icon cve-icon
https://jira.mariadb.org/browse/MDEV-40329 cve-icon cve-icon
History

Fri, 16 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 16 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
Description MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ST_AsText can write beyond an allocated output buffer when converting deeply nested GeometryCollections because recursive WKT serialization does not account for bytes consumed or reserve sufficient space. A low-privileged remote attacker can submit a specially crafted GIS object to corrupt memory and potentially achieve code execution when combined with another vulnerability. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.
Title MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-16T17:05:31.146Z

Reserved: 2026-09-04T14:50:16.720Z

Link: CVE-2026-85746

cve-icon Vulnrichment

Updated: 2026-10-16T16:49:59.450Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-16T17:17:51.167

Modified: 2026-10-16T18:19:16.007

Link: CVE-2026-85746

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T18:30:14Z

Weaknesses