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CVE-2026-26017

Updated on 06 Mar 2026

Severity

6.3 Medium severity

Details

CVSS score
6.3
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

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.

Details

Affected product:
Loki , coredns/coredns , github.com/coredns/coredns , github.com/hashicorp/consul , github.com/influxdata/telegraf , hashicorp/consul , influxdata/telegraf
Affected packages:
github.com/coredns/coredns @ 1.1.2 (+14 more)
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.