CVE-2026-71194
Quick assessment
Affected
OpenStack Designate
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
OpenStack Designate是OpenStack基金会开源的一个提供DNS服务的组件。 OpenStack Designate 22.0.2之前版本存在权限许可和访问控制问题漏洞，该漏洞源于mDNS处理程序在解析记录查询和NOTIFY请求时执行不区分池的查找，当不同池中存在同名区域时，查找失败并返回REFUSED，导致通过该路径的所有DNS查询被拒绝；_handle_notify路径可通过单个未经身份验证的UDP数据包利用，导致拒绝服务。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-71194
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在范围间的资源转移不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenStack Designate 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenStack Designate是OpenStack基金会开源的一个提供DNS服务的组件。 OpenStack Designate 22.0.2之前版本存在权限许可和访问控制问题漏洞，该漏洞源于mDNS处理程序在解析记录查询和NOTIFY请求时执行不区分池的查找，当不同池中存在同名区域时，查找失败并返回REFUSED，导致通过该路径的所有DNS查询被拒绝；_handle_notify路径可通过单个未经身份验证的UDP数据包利用，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-71194
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-71194 (2)
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🔗 403 Forbidden vendor-advisory
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Mailing List Discussions for CVE-2026-71194 (1)
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🔗 oss-security - [OSSA-2026-034] OpenStack Designate: Cross-tenant DNS zone overlap and mDNS DoS via pool scheduling (CVE-2026-71193, CVE-2026-71194) Read full article issue-tracking vendor-advisory mailing-list
IV. Related Vulnerabilities
Same product: Designate