CVE-2026-26018— CoreDNS Loop Detection Denial of Service Vulnerability
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I. Basic Information for CVE-2026-26018
Vulnerability Information
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Vulnerability Title
CoreDNS Loop Detection Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. 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:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
PRNG中使用可预测种子
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，该漏洞源于循环检测插件存在拒绝服务漏洞，可能导致DNS服务器崩溃。
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-2026-26018
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- Release v1.14.2 · coredns/coredns · GitHubx_refsource_MISC
- CoreDNS Loop Plugin DoS · Advisory · coredns/coredns · GitHubx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-26018
IV. Related Vulnerabilities
Same product: coredns
- CVE-2026-35579
CoreDNS TSIG authentication bypass on gRPC, QUIC, DoH, and D - CVE-2026-33489
CoreDNS transfer plugin subzone ACL bypass via lexicographic - CVE-2026-32936
CoreDNS DoH GET path missing size validation causes CPU and - CVE-2026-32934
CoreDNS DNS-over-QUIC unbounded goroutine growth leads to de - CVE-2026-33190
CoreDNS TSIG authentication bypass on encrypted DNS transpor
Same vendor: coredns
- CVE-2026-35579
CoreDNS TSIG authentication bypass on gRPC, QUIC, DoH, and D - CVE-2026-33489
CoreDNS transfer plugin subzone ACL bypass via lexicographic - CVE-2026-32936
CoreDNS DoH GET path missing size validation causes CPU and - CVE-2026-32934
CoreDNS DNS-over-QUIC unbounded goroutine growth leads to de - CVE-2026-33190
CoreDNS TSIG authentication bypass on encrypted DNS transpor
Same weakness: CWE-337
- CVE-2026-25235
PEAR Has a Predictable Verification Hash in Election Account - CVE-2025-62710
Sakai kernel-impl: predictable PRNG used to generate server‑ - CVE-2025-55069
AutomationDirect CLICK PLUS Predictable Seed in Pseudo-Rando - CVE-2025-7770
Predictable Seed in Pseudo-Random Number Generator (PRNG) in - CVE-2024-7558
Juju 安全漏洞
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