Time-of-check Time-of-use (TOCTOU) Affecting kubernetes-dns-node-cache-fips package, versions <1.26.7-r11


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-KUBERNETESDNSNODECACHEFIPS-15440407
  • published8 Mar 2026
  • disclosed6 Mar 2026

Introduced: 6 Mar 2026

NewCVE-2026-26017  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade Chainguard kubernetes-dns-node-cache-fips to version 1.26.7-r11 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kubernetes-dns-node-cache-fips package and not the kubernetes-dns-node-cache-fips package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1