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I. Basic Information for CVE-2026-26017
Vulnerability Information
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Vulnerability Title
CoreDNS ACL Bypass
Source: NVD (National Vulnerability Database)
Vulnerability Description
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a logical vulnerability in CoreDNS allows DNS access controls to be bypassed due to the default execution order of plugins. Security plugins such as acl are evaluated before the rewrite plugin, resulting in a Time-of-Check Time-of-Use (TOCTOU) flaw. This issue has been patched in version 1.14.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: NVD (National Vulnerability Database)
Vulnerability Title
CoreDNS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CoreDNS是CoreDNS社区的一个 DNS 服务器。 CoreDNS 1.14.2之前版本存在安全漏洞，该漏洞源于插件默认执行顺序存在逻辑漏洞，可能导致DNS访问控制被绕过。
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
VendorProductAffected VersionsCPESubscribe
corednscoredns < 1.14.2 -
II. Public POCs for CVE-2026-26017
#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
kimi-k2.5 · 10816 chars
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III. Intelligence Information for CVE-2026-26017
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IV. Related Vulnerabilities
Same product: coredns
Same vendor: coredns
Same weakness: CWE-367
V. Comments for CVE-2026-26017

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