CVE-2026-85746

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 3.1

9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2026-10-16

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

Affected

• mariadb:mariadb

References

• https://github.com/MariaDB/server/commit/5c04ca5524385356ff7cf84974a7d491974c1f85
• https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19
• https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28
• https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13
• https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9

Check your stackJSON