CVE-2026-71193
Auth bypass enables cross-tenant DNS hijack and DoS in OpenStack Designate <22.0.1.
Is CVE-2026-71193 being exploited?
Not confirmed. CVE-2026-71193 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 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-71193?
CVE-2026-71193 is rated Critical with a CVSS score of 9.6. 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-2026-71193?
Yes. A fix has been recorded for CVE-2026-71193. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-71193 affect?
CVE-2026-71193 affects OpenStack Designate <22.0.1, Deployments using multi-pool + AttributeFilter scheduler, Self-service tiering configurations. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-71193?
Upgrade Designate to 22.0.1; or disable AttributeFilter / restrict scheduler pools.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can schedule overlapping zones to other tenants via AttributeFilter, enabling DNS hijack (traffic redirection) and DNS denial-of-service.
Immediate action required
- affected>= 1.0.0 and < 20.0.2
- affected>= 21.0.0 and < 21.0.1
- affected>= 22.0.0 and < 22.0.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.