Name: CVE-2026-23556: Improper Preservation of Permissions
Creator: Rapid7
Published: 2026-07-09T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-23556, CWE-281, CVSS 9.4, EPSS 0.00137

When oxenstored is tearing a domain down, the node data is cleaned up but the usage counts are leaked.

When the domain ID is eventually reused, the new domain can create fewer nodes before beeing deemed to be over quota.

CVSS Details

CVSS 4.0 Base Score: 9.4 (CRITICAL)
CVSS 4.0 Vector: (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade xen	Aug 11, 2026	Jul 9, 2026

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CVSS Details

Covered by Rapid7

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