CVE-2026-46863: Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection Handli

This month

HIGH 7.5REMOTEWATCHLISTUPGRADEUPGRADE

CVE-2026-46863 is a high-severity flaw (CVSS 7.5) affecting mysql cluster, mysql server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability 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

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-400
Published	2026-06-17
Last modified	2026-06-18

Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-06-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-17 10:54 UTCPublished CVE record published
2026-06-18 22:55 UTCUpdated Record last modified

oracle mysql cluster UPGRADE

Affected: >= 8.0.11 and <= 8.0.46 · >= 8.4.0 and <= 8.4.9 · >= 9.0.0 and <= 9.7.0

Fixed in: newer than 9.7.0

Safe to downgrade to: a release before 8.0.11

1. Check installed version

apt-cache policy mysql-cluster || rpm -q mysql-cluster || mysql-cluster --version

2. UPGRADE to newer than 9.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mysql-cluster

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mysql-cluster

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.0.11 (Debian / Ubuntu)

apt-cache madison mysql-cluster sudo apt install mysql-cluster=<VERSION_BEFORE_8.0.11> sudo apt-mark hold mysql-cluster

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mysql-cluster sudo dnf downgrade mysql-cluster-<VERSION_BEFORE_8.0.11> sudo dnf versionlock add mysql-cluster

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

oracle mysql server UPGRADE

Affected: >= 8.4.0 and <= 8.4.9 · >= 9.0.0 and <= 9.7.0

Fixed in: newer than 9.7.0

Safe to downgrade to: a release before 8.4.0

1. Check installed version

apt-cache policy mysql-server || rpm -q mysql-server || mysql-server --version

2. UPGRADE to newer than 9.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mysql-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mysql-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.4.0 (Debian / Ubuntu)

apt-cache madison mysql-server sudo apt install mysql-server=<VERSION_BEFORE_8.4.0> sudo apt-mark hold mysql-server

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mysql-server sudo dnf downgrade mysql-server-<VERSION_BEFORE_8.4.0> sudo dnf versionlock add mysql-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-46863?

mysql cluster: upgrade to newer than 9.7.0; mysql server: upgrade to newer than 9.7.0. Exact commands for each OS are on this page.

Is CVE-2026-46863 being exploited?

CVE-2026-46863 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-46863 affect?

CVE-2026-46863 affects mysql cluster, mysql server. Severity is high (CVSS 7.5). Vulnerability 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 a

How urgent is CVE-2026-46863?

Priority 46/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

MySQL vulnerabilities

Related CVEs

CVE-2026-60171 MEDIUM 4.9 UPGRADE Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Server: Optimizer)
CVE-2026-47023 MEDIUM 4.9 UPGRADE UPGRADE Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication)
CVE-2026-60190 LOW 2.2 UPGRADE UPGRADE Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication)
CVE-2026-60569 MEDIUM 5.1 UPGRADE Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: NDB Operator)
CVE-2026-60592 HIGH 8.2 UPGRADE Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: NDB Operator)

References

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