Bug 2445244 (CVE-2026-26017) - CVE-2026-26017 github.com/coredns/coredns: CoreDNS: DNS access control bypass due to plugin execution order flaw
Summary: CVE-2026-26017 github.com/coredns/coredns: CoreDNS: DNS access control bypass...
Keywords:
Status: NEW
Alias: CVE-2026-26017
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-06 16:02 UTC by OSIDB Bzimport
Modified: 2026-03-06 18:21 UTC (History)
5 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-03-06 16:02:09 UTC 
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.
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