CVE-2026-71193: In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone

This month

CRITICAL 9.6

CVE-2026-71193 is a critical-severity flaw (CVSS 9.6) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone DB constraint) are scoped to the target pool only. An authenticated user can bypass these checks by scheduling a zone to a different pool via the AttributeFilter scheduler, creating an overlapping zone that conflicts with another tenant's zone. This enables cross-tenant DNS hijack (redirecting traffic to attacker-controlled IPs) and DNS

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-08-12
Last modified	2026-10-24

Publisher (CNA): MITRE

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-12 23:17 UTCPublished CVE record published
2026-10-24 15:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · fooyin · FIXED · 0.14.1-6.fc46 · FEDORA-2026-a597ed324c · source

sudo dnf upgrade --advisory=FEDORA-2026-a597ed324c

Debian 12 · designate · FIXED · 1:15.0.2-0+deb11u1

sudo apt update && sudo apt install --only-upgrade designate dpkg --compare-versions "$(dpkg-query -W -f='${Version}' designate)" ge "1:15.0.2-0+deb11u1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · designate · FIXED · 1:20.0.0-2+deb13u1

sudo apt update && sudo apt install --only-upgrade designate dpkg --compare-versions "$(dpkg-query -W -f='${Version}' designate)" ge "1:20.0.0-2+deb13u1" && echo PATCHED || echo STILL-VULNERABLE

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-71193?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-71193 being exploited?

CVE-2026-71193 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-71193 affect?

CVE-2026-71193 affects affected software. Severity is critical (CVSS 9.6). In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone DB constraint) are scoped to the target pool only. An authenticated user can bypass these checks by scheduling a zone to a differ

How urgent is CVE-2026-71193?

Priority 45/100. Critical severity

References

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