CVE-2026-71193Network attack vector

Cross-tenant DNS hijack via pool-scoped zone checks

Published Aug 12, 2026 · Updated Aug 12, 2026

Incorrect authorization in OpenStack Designate 1.0.0 through 20.0.1, 21.0.0, and 22.0.0 allows remote authenticated users to hijack DNS. Zone creation checks and the duplicate-zone database constraint query only the selected pool, so AttributeFilter scheduling can place an overlapping zone in another tenant’s namespace. Exploitation requires multiple pools and the non-default AttributeFilter, permitting traffic redirection to attacker-controlled addresses or NODATA responses.

CVSS severity9.6
Critical
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in OpenStack Designate 1.0.0 through 20.0.1, 21.0.0, and 22.0.0 allows remote authenticated users to hijack DNS. Zone creation checks and the duplicate-zone database constraint query only the selected pool, so AttributeFilter scheduling can place an overlapping zone in another tenant’s namespace. Exploitation requires multiple pools and the non-default AttributeFilter, permitting traffic redirection to attacker-controlled addresses or NODATA responses.

The record

CVE
CVE-2026-71193
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
OpenStack
Product
Designate
Classifications
CWE-863, T1565.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <20.0.2
  2. Affected versionversion=21.0.0 <21.0.1
  3. Affected versionversion=22.0.0 <22.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenStack · Designateversion=1.0.0 <20.0.2; version=21.0.0 <21.0.1; version=22.0.0 <22.0.1

Published CVSS scores

9.6MITRECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1565.002Transmitted Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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