Critical severity · published Oct 16, 2026
CVE-2026-85746
MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
9.9
CVSS
1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
server · MariaDB
>= 10.6.1, < 10.6.28; >= 10.11.1, < 10.11.19; >= 11.4.1, < 11.4.13; >= 11.8.1, < 11.8.9; >= 12.3.1, < 12.3.3; >= 13.0.1, < 13.0.2 · source: vendor
MA
Mariadb · Mariadb
10.6.1 before 10.6.28; 10.11.1 before 10.11.19; 11.4.1 before 11.4.13; 11.8.1 before 11.8.9; 12.3.1 before 12.3.3; 13.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-85746
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-85746
Patch
https://github.com/MariaDB/server/commit/5c04ca5524385356ff7cf84974a7d491974c1f85
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3
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