Is CVE-2026-85746 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-85746 being exploited in the wild.

How severe is CVE-2026-85746?

Critical severity, with a CVSS score of 9.9, published 16 October 2026.

Which products and versions are affected?

MariaDB Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.4.0 to 11.4.12, 11.8.0 to 11.8.8, 12.3.0 to 12.3.2, 13.0.0 to 13.0.1.

Is there a fix for CVE-2026-85746?

Yes: fixed in MariaDB Server 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-85746 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-85746?

Check whether you run MariaDB Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-85746: MariaDB ST_AsText buffer overflow in nested GeometryCollections

CVE-2026-85746 · Severity: critical · CVSS 9.9 · Published 2026-10-16

MariaDB is a widely-used open-source database server that processes geographic and spatial data. A flaw in the ST_AsText function allows an attacker with database access to submit a specially crafted geographic object that corrupts memory, potentially leading to remote code execution on the database server.

Technologies: MariaDB Server. Vendors: Mariadb.

Quick answers

Is CVE-2026-85746 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-85746 being exploited in the wild.
How severe is CVE-2026-85746?: Critical severity, with a CVSS score of 9.9, published 16 October 2026.
Which products and versions are affected?: MariaDB Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.4.0 to 11.4.12, 11.8.0 to 11.8.8, 12.3.0 to 12.3.2, 13.0.0 to 13.0.1.
Is there a fix for CVE-2026-85746?: Yes: fixed in MariaDB Server 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-85746 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-85746?: Check whether you run MariaDB Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: MariaDB Server 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2

Technical details

The ST_AsText function performs recursive WKT (Well-Known Text) serialization of GeometryCollections without properly accounting for bytes already written to the output buffer. This causes a heap buffer overflow when deeply nested geometry structures are converted. A low-privileged remote attacker can exploit this via a crafted GIS object to achieve memory corruption and potentially code execution, especially when combined with other vulnerabilities.

Affected products

MariaDB MariaDB Server 10.6.1 to 10.6.27, 10.11.0 to 10.11.18, 11.4.0 to 11.4.12, 11.8.0 to 11.8.8, 12.3.0 to 12.3.2, 13.0.0 to 13.0.1

Timeline

2026-10-16: disclosed

References

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