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CVE-2026-47040 Oracle Database Server

Affected softwareOracle Database Server
Affected versions19.3-19.31, 21.3-21.22, 23.4.0-23.26.2
Severity9.1 Critical CVSS 3.1
Fixed inOracle Critical Patch Update July 2026
WeaknessMissing authentication (CWE-306)
Published21 Jul 2026
Updated24 Oct 2026

Description

Vulnerability in the Oracle Net Services component of Oracle Database Server. Supported versions that are affected are 19.3-19.31, 21.3-21.22 and 23.4.0-23.26.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Net Services accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 9.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.49% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review automated Upstream data
  • Record active
Decided by The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached
Finding This CVE names only products the Waratek agent cannot be installed into (oracle/database_server). They ship as sealed appliance images or as native code with no application JVM, so there is no start-up line to add -javaagent to. The vulnerability may well be a Java one; it is permanently out of ARMR's reach rather than outside its subject.

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update July 2026 ↗ CPU 2026-Q3 Oracle Database Server / Oracle Net Services (19.3-19.31, 21.3-21.22, 23.4.0-23.26.2)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Database Server Oracle Net Services 19.3-19.31, 21.3-21.22, 23.4.0-23.26.2

Products and versions

1 product, 3 version entries
SourceVendorProductSchemeAffected versions
nvd oracle database server generic ≥ 19.3 and ≤ 19.31 · ≥ 21.3 and ≤ 21.22 · ≥ 23.4 and ≤ 23.26.2

References

URLTags
https://www.oracle.com/security-alerts/cpujul2026.html Vendor Advisory

Timeline

Published2026-07-21By the CVE Program.
NVD record modified2026-10-24NVD's own last-modified date for this record.