CVE-2026-92761CWE-862broken-access-control

CVE-2026-92761

High · published September 17, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
48.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00614 · 48.7th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-09-17T01:17Z
References (7)
https://github.com/retspen/webvirtcloud · [email protected]https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L316-L330 · [email protected]https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L356-L363 · [email protected]https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L538-L546 · [email protected]https://github.com/retspen/webvirtcloud/issues/682 · [email protected]https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-instance-control-actions · [email protected]https://github.com/retspen/webvirtcloud/issues/682 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 SEP 04:02Z
    EPSS moved — → 0%
    epss
  • 16 SEP 20:32Z
    WebVirtCloud Missing Authorization on Instance Control Actions
    cvelistv5