CVE-2026-71064 Auth bypass in Oracle Database Server
Unauthenticated attackers on the local network can take over Oracle Portable Clusterware, leading to full system compromise.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71064?
CVE-2026-71064 is a critical authentication bypass vulnerability in Oracle Database Server, published on 18 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Weakness: CWE-284
Which versions are affected by CVE-2026-71064?
It affects 1 product.
Products include Oracle Database Server.
How do I fix CVE-2026-71064?
No fix has been published for CVE-2026-71064 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-71064 being exploited?
There is no known exploitation of CVE-2026-71064 in the wild and no public exploit code.
Other vulnerabilities in Oracle Database Server
Sources
Also known as GHSA-cqqr-rw66-59mx.