CVE-2026-34318: Vulnerability in the MySQL Shell product of Oracle MySQL (component: Shell: Core Client)

Routine

MEDIUM 5.8WATCHLISTUPGRADE

CVE-2026-34318 is a medium-severity flaw (CVSS 5.8) affecting mysql. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the MySQL Shell product of Oracle MySQL (component: Shell: Core Client). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Shell. While the vulnerability is in MySQL Shell, attacks may significantly impact additional products (scope change). Successful attacks of t

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-200
Published	2026-04-21
Last modified	2026-10-26

Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 21:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

oracle mysql UPGRADE

Affected: >= 8.0.0 and <= 8.0.45 · >= 8.4.0 and <= 8.4.8 · >= 9.0.0 and <= 9.6.0

Fixed in: newer than 9.6.0

Safe to downgrade to: a release before 8.0.0

1. Check installed version

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

2. UPGRADE to newer than 9.6.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mysql

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 8.0.0 (Debian / Ubuntu)

apt-cache madison mysql sudo apt install mysql=<VERSION_BEFORE_8.0.0> sudo apt-mark hold mysql

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

dnf --showduplicates list mysql sudo dnf downgrade mysql-<VERSION_BEFORE_8.0.0> sudo dnf versionlock add mysql

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-2026-34318?

mysql: upgrade to newer than 9.6.0. Exact commands for each OS are on this page.

Is CVE-2026-34318 being exploited?

CVE-2026-34318 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-2026-34318 affect?

CVE-2026-34318 affects mysql. Severity is medium (CVSS 5.8). Vulnerability in the MySQL Shell product of Oracle MySQL (component: Shell: Core Client). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Difficult to exploit vulnerability allows high privileged attack

How urgent is CVE-2026-34318?

Priority 30/100. On your watchlist

Software pages

MySQL vulnerabilities

Related CVEs

CVE-2026-34317 MEDIUM 5.0 UPGRADE Vulnerability in the MySQL Shell product of Oracle MySQL (component: Shell: Core Client)
CVE-2026-34319 MEDIUM 5.0 UPGRADE Vulnerability in the MySQL Shell product of Oracle MySQL (component: Shell: Core Client)

References

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