{"id":"CVE-2026-92761","title":"WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions","summary":"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 ke…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-862"],"vendor":"retspen","product":"webvirtcloud","affected":["webvirtcloud 1b2da68b2800f94674dd96f4a986cde30ac88280"],"published":"2026-09-16","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:48.237","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92761","references":[{"url":"https://github.com/retspen/webvirtcloud","label":"disclosure@vulncheck.com"},{"url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L316-L330","label":"disclosure@vulncheck.com"},{"url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L356-L363","label":"disclosure@vulncheck.com"},{"url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L538-L546","label":"disclosure@vulncheck.com"},{"url":"https://github.com/retspen/webvirtcloud/issues/682","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-instance-control-actions","label":"disclosure@vulncheck.com"},{"url":"https://github.com/retspen/webvirtcloud/issues/682","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00444,"epssPercentile":0.38011,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-21T17:48:35.204918Z"},"ingestedAt":"2026-09-16T21:05:36.897Z","slug":"CVE-2026-92761","body":"## Overview\n\nWebVirtCloud 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":60,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":208707,"id":"CVE-2026-92761","ts":1790016699971,"field":"exploit_available","old":"false","new":"true"}]}