Buffer overflow in Mariadb
CVE-2026-32710
MariaDB server is a community developed fork of MySQL server. An authenticated user can crash MariaDB versions 11.4 before 11.4.10 and 11.8 before 11.8.6 via a bug in JSON_SCHEMA_VALID() function. Under certain conditions it might be possible to turn the crash into a remote code execution. These conditions require tight control over memory layout which is generally only attainable in a lab environment. This issue is fixed in MariaDB 11.4.10, MariaDB 11.8.6, and MariaDB 12.2.2.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.001
Affected products
- Mariadb — versions 12.1.2
- Mariadb Server — versions >= 11.4.1, < 11.4.10, >= 11.8.1, < 11.8.6, >= 12.1.2, < 12.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/MariaDB/server/security/advisories/GHSA-4rj5-2227-9wgc (Vendor Advisory)
- https://jira.mariadb.org/browse/MDEV-38356 (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-32710?
- CVE-2026-32710 is a high-severity vulnerability in Mariadb, classified under Heap-based Buffer Overflow. CVSS score: 8.5/10. Published 2026-03-20.
- How severe is CVE-2026-32710?
- High severity. CVSS v3 base score is 8.5 out of 10.
- Is CVE-2026-32710 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.