CVE-2026-32710Public exploitNetwork attack vector

Authenticated server crash via oversized JSON enum

Published Mar 20, 2026 · Updated Mar 20, 2026

Heap overflow in MariaDB Server 11.4.1 through 11.4.9, 11.8.1 through 11.8.5, and 12.1.2 allows remote authenticated users to crash it. JSON_SCHEMA_VALID() mishandles an overlong enum string and writes beyond its heap buffer, corrupting adjacent memory. Low-privileged database access is required; code execution additionally requires laboratory-level control of heap layout, while a crash is directly reproducible.

CVSS severity8.5
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in MariaDB Server 11.4.1 through 11.4.9, 11.8.1 through 11.8.5, and 12.1.2 allows remote authenticated users to crash it. JSON_SCHEMA_VALID() mishandles an overlong enum string and writes beyond its heap buffer, corrupting adjacent memory. Low-privileged database access is required; code execution additionally requires laboratory-level control of heap layout, while a crash is directly reproducible.

The record

CVE
CVE-2026-32710
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
MariaDB
Product
MariaDB Server
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 11.4.1, < 11.4.10
  2. Affected versionversion=>= 11.8.1, < 11.8.6
  3. Affected versionversion=>= 12.1.2, < 12.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MariaDB · MariaDB Serverversion=>= 11.4.1, < 11.4.10; version=>= 11.8.1, < 11.8.6; version=>= 12.1.2, < 12.2.2

Published CVSS scores

8.5GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
9.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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