{"id":"CVE-2026-92761","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-92761","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…","details":"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.","published":"2026-09-16T21:17:24.780","modified":"2026-09-16T21:17:24.780","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/retspen/webvirtcloud"},{"type":"WEB","url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L316-L330"},{"type":"WEB","url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L356-L363"},{"type":"WEB","url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L538-L546"},{"type":"WEB","url":"https://github.com/retspen/webvirtcloud/issues/682"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-instance-control-actions"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T21:17:24.780"}}