CVE-2026-92761

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.8
EG Score
8.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 16, 2026

Advisory Details (6)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

WebVirtCloud Missing Authorization on Instance Control Actions | Advisories | VulnCheck

https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-instance-control-actions
generic

webvirtcloud/instances/views.py at 1b2da68b2800f94674dd96f4a986cde30ac88280 · retspen/webvirtcloud · GitHub

https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L538-L546
generic

webvirtcloud/instances/views.py at 1b2da68b2800f94674dd96f4a986cde30ac88280 · retspen/webvirtcloud · GitHub

https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L356-L363
generic

webvirtcloud/instances/views.py at 1b2da68b2800f94674dd96f4a986cde30ac88280 · retspen/webvirtcloud · GitHub

https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L316-L330
generic

GitHub - retspen/webvirtcloud: WebVirtCloud is virtualization web interface for admins and users · GitHub

https://github.com/retspen/webvirtcloud
generic

View-only instance grant (is_change=False) can still power off, reset root password, inject SSH key, mount ISO and detach disks · Issue #682 · retspen/webvirtcloud · GitHub

https://github.com/retspen/webvirtcloud/issues/682

Vendor Advisories for CVE-2026-92761(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 15× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 21:21 UTCEG score recompute
  2. 2026-09-19 21:21 UTCGHSA enrichment
  3. 2026-09-19 09:22 UTCGHSA enrichment
  4. 2026-09-18 21:20 UTCEG score recompute
  5. 2026-09-18 21:20 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 09:21 UTCGHSA enrichment
  8. 2026-09-17 21:22 UTCEG score recompute
  9. 2026-09-17 21:22 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 09:23 UTCEG score recompute
  12. 2026-09-17 09:23 UTCGHSA enrichment
  13. 2026-09-16 21:24 UTCEG score recompute
  14. 2026-09-16 20:40 UTCEG score recompute
  15. 2026-09-16 20:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-92761?
CVE-2026-92761 is a high vulnerability published on September 16, 2026. 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…
When was CVE-2026-92761 disclosed?
CVE-2026-92761 was first published in the National Vulnerability Database on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92761 actively exploited?
CVE-2026-92761 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 62.0% of all scored CVEs.
What is the CVSS score of CVE-2026-92761?
CVE-2026-92761 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-92761?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92761, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-92761

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