PatchTheCEVCVE-2026-71100: Vulnerability in the RDBMS component of Oracle Database Server
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Routine
MEDIUM 5.3REMOTEUPGRADE
CVE-2026-71100 is a medium-severity flaw (CVSS 5.3) affecting database server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in unauthorized read access to a subset of RDBMS accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Ve
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 76%) |
| CISA exploited list | No |
| Weakness | CWE-284 |
| Published | 2026-08-18 |
| Last modified | 2026-10-22 |
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
oracle database server UPGRADE
Affected: >= 19.3 and <= 19.32 · >= 21.3 and <= 21.23 · >= 23.4.0 and <= 23.26.3
Fixed in: newer than 23.26.3
Safe to downgrade to: a release before 19.3
1. Check installed version
apt-cache policy database-server || rpm -q database-server || database-server --version
2. UPGRADE to newer than 23.26.3 (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 19.3 (Debian / Ubuntu)
apt-cache madison database-server
sudo apt install database-server=<VERSION_BEFORE_19.3>
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_19.3>
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.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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