CVE-2026-71194

medium

EUVD alias: EUVD-2026-57692

Assigned by CNA: mitre

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

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CVSS v3

6.8

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

6.8

Description

In OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when resolving record queries and NOTIFY requests. When two zones with the same name exist across different pools, the lookup fails with a deterministic error, causing the handler to return REFUSED for all DNS queries through that path. The _handle_notify path is exploitable via a single unauthenticated UDP packet. This is independently reachable through the cross-tenant zone overlap described in a different recent CVE, and also affects legitimate same-tenant cross-pool configurations. BIND9 views do not mitigate this issue as mDNS is a shared service upstream of any view configuration.

Predictions

Exploit likelihood

77%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-71194 NameCVE-2026-71194 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-2026-71194

Name	CVE-2026-71194
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-669

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

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