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CVE-2026-0397— Information disclosure via CORS misconfiguration

Quick assessment

Affected
PowerDNS DNSdist
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.

DNSdist是DNSdist开源的一款高度感知 DNS、DoS 和滥用的负载均衡器。 DNSdist存在安全漏洞，该漏洞源于启用内部Web服务器时，跨源资源共享策略配置不当，可能导致攻击者诱骗管理员访问恶意网站并从仪表板提取运行配置信息。

CVSS 3.1 · Low EPSS 0.16% · P5
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I. Basic Information for CVE-2026-0397

Vulnerability Information
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Vulnerability Title
Information disclosure via CORS misconfiguration
Source: CVE Program / CVE List V5
Vulnerability Description
When the internal webserver is enabled (default is disabled), an attacker might be able to trick an administrator logged to the dashboard into visiting a malicious website and extract information about the running configuration from the dashboard. The root cause of the issue is a misconfiguration of the Cross-Origin Resource Sharing (CORS) policy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
DNSdist 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DNSdist是DNSdist开源的一款高度感知 DNS、DoS 和滥用的负载均衡器。 DNSdist存在安全漏洞，该漏洞源于启用内部Web服务器时，跨源资源共享策略配置不当，可能导致攻击者诱骗管理员访问恶意网站并从仪表板提取运行配置信息。
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

Vendor Product Affected Versions CPE Subscribe
PowerDNS DNSdist 1.9.0 ~ 1.9.12 -

II. Public POCs for CVE-2026-0397

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III. Intelligence Information for CVE-2026-0397

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Vendor Advisories for CVE-2026-0397 (1)

Same Patch Batch · PowerDNS · 2026-03-31 · 7 CVEs total

CVE-2026-24029 6.5 MEDIUM DNS over HTTPS ACL bypass
CVE-2026-27853 5.9 MEDIUM Out-of-bounds write when rewriting large DNS packets
CVE-2026-24030 5.3 MEDIUM Unbounded memory allocation for DoQ and DoH3
CVE-2026-24028 5.3 MEDIUM Out-of-bounds read when parsing DNS packets via Lua
CVE-2026-27854 4.8 MEDIUM Use after free when parsing EDNS options in Lua
CVE-2026-0396 3.1 LOW HTML injection in the web dashboard

IV. Related Vulnerabilities

Same product: DNSdist
Same vendor: PowerDNS

V. Comments for CVE-2026-0397

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