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CVE-2026-46833: Vulnerability in the Net Service component of Oracle Database Server

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This month
CRITICAL 9.0REMOTEUPGRADE

CVE-2026-46833 is a critical-severity flaw (CVSS 9.0) affecting database server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the Net Service component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.2. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TLS to compromise Net Service. While the vulnerability is in Net Service, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Net Service. CVSS 3

Why this priority

  • Critical severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.0 (Critical)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 74%)
CISA exploited listNo
Published2026-05-28
Last modified2026-07-21
Publisher (CNA): Oracle · Vendor: oracle

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Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

oracle database server UPGRADE
Affected: >= 23.4.0 and <= 23.26.2
Fixed in: newer than 23.26.2
Safe to downgrade to: a release before 23.4.0
1. Check installed version
apt-cache policy database-server || rpm -q database-server || database-server --version
2. UPGRADE to newer than 23.26.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade database-server
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade database-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 23.4.0 (Debian / Ubuntu)
apt-cache madison database-server sudo apt install database-server=<VERSION_BEFORE_23.4.0> sudo apt-mark hold database-server
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list database-server sudo dnf downgrade database-server-<VERSION_BEFORE_23.4.0> sudo dnf versionlock add database-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-2026-46833?

database server: upgrade to newer than 23.26.2. Exact commands for each OS are on this page.

Is CVE-2026-46833 being exploited?

CVE-2026-46833 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-2026-46833 affect?

CVE-2026-46833 affects database server. Severity is critical (CVSS 9.0). Vulnerability in the Net Service component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.2. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TLS to compromise Net

How urgent is CVE-2026-46833?

Priority 43/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Oracle Database vulnerabilities

Related CVEs

References

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