Vulnerability Description
WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions. Attackers with read-only grants can power off virtual machines, reset root passwords, install SSH keys, and manage ISO images by exploiting the get_instance gate that only checks grant existence.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/retspen/webvirtcloud
- https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac
- https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac
- https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac
- https://github.com/retspen/webvirtcloud/issues/682
- https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-insta
FAQ
What is CVE-2026-92761?
CVE-2026-92761 is a vulnerability with a CVSS score of 8.8 (HIGH). WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions. Attackers with read-only grants can power off virtual machines,...
How severe is CVE-2026-92761?
CVE-2026-92761 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-92761?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.