CVE-2026-91256: High severity Oracle Oracle Solaris vulnerability
Vulnerability in the Oracle Solaris product of Oracle Systems (component: Services). The supported version that is affected is 11.4. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Solaris. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Solaris and unauthorized read access to a subset of Oracle Solaris accessible data. CVSS 3.1 Base Score 7.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H).
Affected Software
Event History
Frequently Asked Questions
Who is realistically exposed to this vulnerability?
Oracle Solaris 11.4 systems are affected when the vulnerable Services component is reachable over HTTP by an attacker with network access. Exploitation also requires a low-privileged account, so systems where such accounts can access the HTTP service face the relevant exposure.
What level of access does an attacker need?
An attacker needs network access via HTTP and low privileges. No user interaction is required, and the vulnerability is rated as low complexity to exploit.
What could successful exploitation do?
A successful attack can cause Oracle Solaris to hang or crash repeatedly, resulting in a complete denial of service. It can also allow unauthorized reading of a subset of accessible Oracle Solaris data.