Critical 9.9Published Oct 16, 2026

CVE-2026-85748MariaDB: Use-after-free with a large number of SYS_REFCURSOR's

Updated under an hour ago (Oct 28, 2026, 5:30 AM 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 0.92%, higher than 60% 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 12.3.1 until 12.3.3 and 13.0.2, SYS_REFCURSOR handling is affected because cursor-array reallocation can leave stale references in routine contexts. A low-privileged attacker can open a large number of SYS_REFCURSORs and then fetch one to trigger a use-after-free that can enable remote code execution when combined with another vulnerability. This issue is fixed in versions 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-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.92% (percentile 60)
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 12.3.1, < 12.3.3; from 13.0.1, < 13.0.2	CNA record
mariadb mariadb mariadb:mariadb	from 12.3.1 before 12.3.3; 13.0.1	NVD

References

References

https://github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprm	x-refsource-confirm, vendor-advisory
https://github.com/MariaDB/server/commit/91156c3de58762196605150ab3f756fe952592d1	x-refsource-misc, patch
https://github.com/MariaDB/server/commit/9b075b2cb53338f67e7230cc585e02d2d34514ed	x-refsource-misc, patch
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-40396	x-refsource-misc, issue-tracking
https://jira.mariadb.org/browse/MDEV-40639	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.