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    CVE-2026-26017

    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.

    Published:Mar 6, 2026
    Last Modified:Apr 16, 2026
    EPS:Mar 6, 2026
    EPSS Score:0.00059
    CVSS Score:7.7

    Affected Products

    Vendor
    Coredns.io
    Product
    Coredns

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-62299 (CVSS 5.3) — CoreDNS is a DNS server written in Go. Prior to 1.14.5, the CoreDNS rewrite plugin supports edns0 rewrite rule…
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    CVE-2026-62994 (CVSS 3.7) — CoreDNS is a DNS server written in Go. From 1.9.4 until 1.14.5, a network DNS client allowed to request AXFR f…
    CVE-2026-35579 (CVSS 8.2) — CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3 transport im…
    CVE-2026-33489 (CVSS 8.2) — CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the w…
    CVE-2026-32936 (CVSS 8.7) — CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-HTTPS (DoH) GET path ac…
    CVE-2026-32934 (CVSS 8.7) — CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can b…
    CVE-2026-33190 (CVSS 8.7) — CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on n…
    CVE-2026-26018 (CVSS 7.5) — CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists…
    CVE-2025-68151 (CVSS 6.6) — CoreDNS is a DNS server that chains plugins. Prior to version 1.14.0, multiple CoreDNS server implementations …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High