CVE-2026-23560

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
9.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.4Exploit: NoneExposed: 0

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

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] XAPI can configure different users with different roles, using Role Based Access Control. For more details, see:

https://docs.xenserver.com/en-us/xencenter/current-release/rbac-overview.html#rbac-roles

The pool-admin role is fully privileged. Notably, users with this role can also SSH into the host as root.

The other administrator roles are pool-operator, vm-power-admin and vm-admin, each of which are authorised to configure and manage various aspects of the system.

Some settings are inadequately restricted, and can be set by a lower privilege of administrator than expected.

* CVE-2026-23559: A vm-admin can set VBD.other_config:backend-local and turn arbitrary files in dom0 into VDIs (virtual disks) and give said disks to a VM they control. This is an arbitrary read and/or modify of files in dom0.

* CVE-2026-23560: A vm-admin can set VM.other-config:is_system_domain and mark a VM as a system domain. System domains are ignored and left running during certain other host/pool operations, and may be hidden from view in tooling.

* CVE-2026-23561: A vm-admin can set VM.other_config:storage_driver_domain and mark a VM as the storage domain for a particular host storage connection (PBD). Shutting down the VM can cause the PBD to be erroneously marked as unplugged when it is not.

* CVE-2026-23562: Configuration of PCI passthrough is normally restricted to the pool-admin role. However one API was missing this check, allowing a vm-admin access to unintended host hardware.

* CVE-2026-42486: A vm-admin can set the VM.platform:hvm_serial parameter, which should be restricted to the pool-admin role, as it can allow arbitrary dom0 file write.

CVSS v3
9.4
EG Score
9.4(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity94% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
3.8%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

XSA-489 - Xen Security Advisories

https://xenbits.xen.org/xsa/advisory-489.html

Vendor Advisories for CVE-2026-23560(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 16× in last 7d / 70× 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. 2026-07-23 03:07 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-17 05:34 UTCGHSA enrichment
  11. 2026-07-17 01:42 UTCGHSA enrichment
  12. 2026-07-16 21:51 UTCGHSA enrichment
  13. 2026-07-16 18:00 UTCGHSA enrichment
  14. 2026-07-16 17:03 UTCEPSS rescore
  15. 2026-07-16 17:03 UTCEPSS rescore
  16. 2026-07-16 14:06 UTCGHSA enrichment
  17. 2026-07-16 10:13 UTCGHSA enrichment
  18. 2026-07-16 06:20 UTCGHSA enrichment
  19. 2026-07-16 02:23 UTCGHSA enrichment
  20. 2026-07-15 22:32 UTCGHSA enrichment
  21. 2026-07-15 18:41 UTCGHSA enrichment
  22. 2026-07-15 16:57 UTCEPSS rescore
  23. 2026-07-15 16:57 UTCEPSS rescore
  24. 2026-07-15 14:48 UTCGHSA enrichment
  25. 2026-07-15 10:56 UTCGHSA enrichment
Show 45 more
  1. 2026-07-15 07:04 UTCGHSA enrichment
  2. 2026-07-15 03:11 UTCGHSA enrichment
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-14 23:20 UTCGHSA enrichment
  6. 2026-07-14 19:24 UTCGHSA enrichment
  7. 2026-07-14 15:31 UTCGHSA enrichment
  8. 2026-07-14 11:38 UTCGHSA enrichment
  9. 2026-07-14 07:46 UTCGHSA enrichment
  10. 2026-07-14 03:52 UTCGHSA enrichment
  11. 2026-07-14 00:01 UTCGHSA enrichment
  12. 2026-07-13 22:30 UTCEPSS rescore
  13. 2026-07-13 20:09 UTCGHSA enrichment
  14. 2026-07-13 16:17 UTCGHSA enrichment
  15. 2026-07-13 12:25 UTCGHSA enrichment
  16. 2026-07-13 08:33 UTCGHSA enrichment
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 04:40 UTCGHSA enrichment
  20. 2026-07-13 00:48 UTCGHSA enrichment
  21. 2026-07-12 20:55 UTCGHSA enrichment
  22. 2026-07-12 17:01 UTCGHSA enrichment
  23. 2026-07-12 13:09 UTCGHSA enrichment
  24. 2026-07-12 09:17 UTCGHSA enrichment
  25. 2026-07-12 05:46 UTCEPSS rescore
  26. 2026-07-12 05:46 UTCEPSS rescore
  27. 2026-07-12 05:25 UTCGHSA enrichment
  28. 2026-07-12 01:34 UTCGHSA enrichment
  29. 2026-07-11 21:43 UTCGHSA enrichment
  30. 2026-07-11 17:52 UTCGHSA enrichment
  31. 2026-07-11 14:00 UTCGHSA enrichment
  32. 2026-07-11 10:06 UTCGHSA enrichment
  33. 2026-07-11 08:27 UTCEPSS rescore
  34. 2026-07-11 06:14 UTCGHSA enrichment
  35. 2026-07-11 02:22 UTCGHSA enrichment
  36. 2026-07-10 22:31 UTCGHSA enrichment
  37. 2026-07-10 18:40 UTCGHSA enrichment
  38. 2026-07-10 14:48 UTCGHSA enrichment
  39. 2026-07-10 10:56 UTCGHSA enrichment
  40. 2026-07-10 07:05 UTCGHSA enrichment
  41. 2026-07-10 03:12 UTCGHSA enrichment
  42. 2026-07-09 23:20 UTCGHSA enrichment
  43. 2026-07-09 19:29 UTCGHSA enrichment
  44. 2026-07-09 15:37 UTCEG score recompute
  45. 2026-07-09 15:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-23560?
CVE-2026-23560 is a critical vulnerability published on July 9, 2026. [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] XAPI can configure different users with different roles, using Role Based Access Control. For more details, see:…
When was CVE-2026-23560 disclosed?
CVE-2026-23560 was first published in the National Vulnerability Database on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23560 actively exploited?
CVE-2026-23560 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-23560?
CVE-2026-23560 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-23560?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23560, 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.

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