CVE-2026-71193

critical EU-CRITICAL

EUVD alias: EUVD-2026-57689

Assigned by CNA: mitre

Published 2026-08-12 · Modified 2026-08-12

Discuss on Community Propose mitigation

CVSS v3

9.6

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

9.6

Description

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.

Predictions

Exploit likelihood

96%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-71193 NameCVE-2026-71193 SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) Debian Bugs1144145 Vulnerable and fixed packages The table below lists information on source packages. Source PackageReleaseVersionStatus designate (PTS)bullseye1:11.0.0-2vulnerable…

CVE-2026-71193

Name	CVE-2026-71193
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1144145

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
designate (PTS)	bullseye	1:11.0.0-2	vulnerable
	bookworm	1:15.0.0-4	vulnerable
	trixie	1:20.0.0-2	vulnerable
	forky, sid	1:22.0.0-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
designate	source	(unstable)	(unfixed)			1144145

Notes

https://bugs.launchpad.net/designate/+bug/2160533
https://security.openstack.org/ossa/OSSA-2026-034.html

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

https://bugs.launchpad.net/designate/+bug/2160533https://security.openstack.org/ossa/OSSA-2026-034.html

OS impact

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Affected	—
sid	Fixed	`1:22.0.0-2`
forky	Affected	—
bullseye	Affected	—
bookworm	Affected	—

References

CWEs

CWE-863

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.