CVE-2026-23556
oxenstored leaks usage counts causing persistent domain quota corruption and node creation denial.
Is CVE-2026-23556 being exploited?
Not confirmed. CVE-2026-23556 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-23556?
CVE-2026-23556 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-23556?
Yes. A fix has been recorded for CVE-2026-23556. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-23556 affect?
CVE-2026-23556 affects oxenstored daemon, Oxen/Loki storage nodes, domains using oxenstored. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-23556?
Apply vendor patch when released; avoid domain ID reuse and monitor node/usage counts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Persistent quota corruption allows attackers to cause denial of node creation for a domain (persistent DoS of resource provisioning).
Patch when possible