Vulnerability in the Portable Clusterware component of Oracle Database Server
Published Aug 18, 2026
9.6
CRITICALCVSS 3.1
EPSS 0.40%
Description
Vulnerability in the Portable Clusterware 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 access to the physical communication segment attached to the hardware where the Portable Clusterware executes to compromise Portable Clusterware. While the vulnerability is in Portable Clusterware, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Portable Clusterware. CVSS 3.1 Base Score 9.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
Affected products
-
- Version 19.3StatusaffectedConstraints<=19.32
- Version 21.3StatusaffectedConstraints<=21.23
- Version 23.4.0StatusaffectedConstraints<=23.26.3
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oracle Corporation | Oracle Database Server | n/a |
|
- ≥ 19.3 · ≤ 19.32
- ≥ 21.3 · ≤ 21.23
- ≥ 23.4.0 · ≤ 23.26.3
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Aug 19, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.40% (0.00395) | 31.31th | v5 (v2026.06.15) |
| Aug 19, 2026 | 0.26% (0.00257) | 17.61th | v5 (v2026.06.15) |
References (1)
- https://www.oracle.com/security-alerts/cspuaug2026.html vendor-advisoryVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.oracle.com/security-alerts/cspuaug2026.html | vendor-advisoryVendor Advisory |
Change history (0)
No recorded changes yet.