Critical 9.9Published Oct 16, 2026

CVE-2026-85746MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections

Updated under an hour ago (Oct 27, 2026, 11:50 PM ET)

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It affects MariaDB server and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.97%, higher than 62% of scored CVEs.

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Every CVE for MariaDB server

Exploited in the last 30 days

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.

CVSS: 9.9 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.97% (percentile 62)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 16, 2026

Affected products

Affected products

MariaDB server mariadb:server (from the name)	from 10.6.1, < 10.6.28; from 10.11.1, < 10.11.19; from 11.4.1, < 11.4.13; from 11.8.1, < 11.8.9; from 12.3.1, < 12.3.3; from 13.0.1, < 13.0.2	CNA record
mariadb mariadb mariadb:mariadb	from 10.6.1 before 10.6.28; from 10.11.1 before 10.11.19; from 11.4.1 before 11.4.13; from 11.8.1 before 11.8.9; from 12.3.1 before 12.3.3; 13.0.1	NVD

References

References

https://github.com/MariaDB/server/security/advisories/GHSA-8fvj-c57c-pggx	x-refsource-confirm, vendor-advisory
https://github.com/MariaDB/server/commit/5c04ca5524385356ff7cf84974a7d491974c1f85	x-refsource-misc, patch
https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19	x-refsource-misc, release-notes
https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28	x-refsource-misc, release-notes
https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13	x-refsource-misc, release-notes
https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9	x-refsource-misc, release-notes
https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3	x-refsource-misc, release-notes
https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2	x-refsource-misc, release-notes
https://jira.mariadb.org/browse/MDEV-40329	x-refsource-misc, issue-tracking

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.