# CVE-2026-71193 — OpenStack Designate

> As of 2026-08-13, CVE-2026-71193 is a CRITICAL-severity vulnerability in OpenStack Designate, CVSS v3.1 9.6, EPSS 0.5% (41.8th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-71193 as of 2026-08-13; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-13

## What is CVE-2026-71193?

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 denial of service (NODATA responses). Exploitation requires a multi-pool deployment with AttributeFilter enabled in scheduler_filters, which is a non-default but documented and supported configuration for self-service tiering.

The record classifies CVE-2026-71193 under weakness class [CWE-863](https://intel.threadlinqs.com/cwe/CWE-863). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 54 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.6 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H`)
- **EPSS (FIRST):** 0.5% probability of exploitation in the next 30 days, higher than 41.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-12, last modified 2026-08-13

## Is CVE-2026-71193 being exploited?

It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **OpenStack**: Designate

## How to fix CVE-2026-71193

No vendor patch reference has been recorded for CVE-2026-71193 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-71193

No threat campaign in the Threadlinqs corpus currently references CVE-2026-71193, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-08-14. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [security.openstack.org — vendor advisory](https://security.openstack.org/ossa/OSSA-2026-034.html)
- [openwall.com — vendor advisory](https://www.openwall.com/lists/oss-security/2026/08/11/6)

**Issue tracking and product pages**

- [launchpad.net — issue tracking](https://launchpad.net/bugs/2160533)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-71193
Full detection coverage and IOCs for threats exploiting CVE-2026-71193 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp