{"id":"CVE-2026-92761","summary":"WebVirtCloud Missing Authorization on Instance Control Actions","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.","modified":"2026-10-08T02:52:51.845265067Z","published":"2026-09-16T20:32:28.410Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92761.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-862"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92761.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92761"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-instance-control-actions"},{"type":"REPORT","url":"https://github.com/retspen/webvirtcloud/issues/682"},{"type":"PACKAGE","url":"https://github.com/retspen/webvirtcloud"},{"type":"ARTICLE","url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L316-L330"},{"type":"ARTICLE","url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L356-L363"},{"type":"ARTICLE","url":"https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L538-L546"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/retspen/webvirtcloud","events":[{"introduced":"1b2da68b2800f94674dd96f4a986cde30ac88280"},{"last_affected":"1b2da68b2800f94674dd96f4a986cde30ac88280"}]}],"versions":["1b2da68b2800f94674dd96f4a986cde30ac88280"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92761.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}