medium CVSS 4.4 EPSS 0.25%

CVE-2026-46936·MySQL vulnerability

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: DDL). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).

Severity
medium
Software
MySQL
Fixed in
8.0.46-0ubuntu0.22.04.4
Published

How likely is exploitation

FIRST's Exploit Prediction Scoring System puts the probability of this CVE being exploited in the next 30 days at 0.25% — higher than 17% of all published CVEs. EPSS is an independent forecast of exploitation, not a severity rating: it says nothing about how much damage a successful attack does, which is what a CVSS score measures.

Affected versions

From: 8.4.0

Until: 8.4.10

Fixed in: 8.0.46-0ubuntu0.22.04.4

How to fix this CVE

Update MySQL Server to version 8.0.46 or later to resolve a DDL component vulnerability that allows high-privileged attackers to trigger service denial through network protocols. This patch addresses the availability impact by fixing the underlying condition that causes unexpected server hangs or crashes. Administrators should prioritize this update for systems where administrative access is restricted to trusted networks.

sudo dnf update mysql-server

Defensia detects this vulnerability

How to check if you are affected

  1. Check installed MySQL version: mysql --version or SELECT VERSION(); from MySQL client
  2. Verify if vulnerable versions 8.4.0-8.4.10 or 9.7.0-9.7.1 are running: mysql -u root -p -e 'SELECT VERSION();'
  3. Review MySQL error logs for repeated crash dumps or 'InnoDB: Fatal error' messages: grep -i 'fatal\|crash\|hang' /var/log/mysql/error.log
  4. Confirm patch installation by checking package version: apt show mysql-server (Ubuntu/Debian) or rpm -qa mysql-server (RHEL/CentOS)

FAQ

What is CVE-2026-46936?

This is a denial-of-service vulnerability in MySQL's DDL (Data Definition Language) component that allows high-privileged network users to repeatedly crash or hang the MySQL service by exploiting a specific condition in schema operations.

Is CVE-2026-46936 being actively exploited?

No, this vulnerability is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog and has no publicly available exploits, reducing immediate risk.

What versions of MySQL are affected by CVE-2026-46936?

MySQL Server versions 8.4.0 through 8.4.10, 9.7.0 through 9.7.1, and MySQL Cluster versions 8.0.0 through 8.0.47, 8.4.0 through 8.4.10, and 9.7.0 through 9.7.1 are affected.

How do I check if my server is vulnerable to CVE-2026-46936?

Run 'mysql -u root -p -e "SELECT VERSION();"' and verify the output is not within the vulnerable ranges (8.4.0-8.4.10 or 9.7.0-9.7.1 for Server; 8.0.0-8.0.47, 8.4.0-8.4.10, or 9.7.0-9.7.1 for Cluster).

Does Defensia detect CVE-2026-46936?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If MySQL is installed on a monitored server, CVE-2026-46936 will appear in your dashboard with remediation steps.

Related MySQL CVEs

CVE-2026-29080CVSS 8.8A SQL injection vulnerability in `FilterEngine.create_sqla_query()` allows any authenticated Rucio user to execute arbitrary SQL against the backend database through the DID search endpoint (`GET /dids/<scope>/dids/search`). On Oracle deployments attacker-controlled filter keys and values are interpolated directly into `sqlalchemy.text()` via Python `.format()`, completely bypassing parameterization. This enables full database compromise including extraction of authentication tokens, password hashes, and all managed data identifiers. This affects versions 1.27.0 and later before 35.8.5, 38.5.5, 39.4.2, and 40.1.1. The vulnerability exists in `lib/rucio/core/did_meta_plugins/filter_engine.py` within the `create_sqla_query()` method. When the database dialect is Oracle, filter expressions for JSON metadata columns are constructed using `text()` with Python string formatting. Both `key` and `value` are attacker-controlled strings derived from HTTP query parameters. The `text()` function creates a raw SQL fragment — it does **not** escape or parameterize its contents. Any authenticated Rucio user can exploit this through the DID search API to execute arbitrary SQL against the backend database. This can expose all managed data identifiers and sensitive tables such as identities, tokens, accounts, rse_settings, and rules, and may allow modification of database contents. The issue affects Oracle deployments using the default json_meta plugin and does not affect PostgreSQL or MySQL deployments using that plugin. This vulnerability has been fixed in versions 35.8.5, 38.5.5, 39.4.2, and 40.1.1.
CVE-2026-60163CVSS 8.4Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication Plugin). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Easily exploitable vulnerability allows unauthenticated attacker with logon to the infrastructure where MySQL Server, MySQL Cluster executes to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in takeover of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 8.4 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
CVE-2026-60315CVSS 8.2Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: X Plugin). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster and unauthorized read access to a subset of MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H).
CVE-2026-46862CVSS 7.5Vulnerability in the MySQL Router product of Oracle MySQL (component: Router: General). Supported versions that are affected are 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise MySQL Router. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Router. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
CVE-2026-46863CVSS 7.5Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection Handling). Supported versions that are affected are MySQL Server: 8.4.0-8.4.9, 9.0.0-9.7.0; MySQL Cluster: 8.0.11-8.0.46, 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

References

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