Quick answers
- Is CVE-2026-91256 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91256 being exploited in the wild.
- How severe is CVE-2026-91256?
- High severity, with a CVSS score of 7.1, published 20 October 2026.
- Which products and versions are affected?
- Oracle Solaris 11.4.
- Is there a fix for CVE-2026-91256?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-91256 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-91256?
- Check whether you run Oracle Solaris at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability in Oracle Solaris Services (version 11.4) is easily exploitable via network access with HTTP, requiring low privilege credentials. An authenticated attacker can trigger a denial of service (system hang or crash) or unauthorized read access to a subset of system data. The CVSS 3.1 score of 7.1 reflects high availability and partial confidentiality impact.
Affected products
- Oracle Solaris 11.4
Timeline
- 2026-10-20: disclosed