No access to your tenant or devices. Every item links to its source. What this means
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.
Read the publisher's advisoryCoreDNS 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.
Read the publisher's advisoryCoreDNS 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.
Read the publisher's advisoryA 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. ### Impact In multi-tenant Kubernetes clusters, this flaw undermines DNS-based segmentation strategies. Example scenario: 1. ACL blocks access to *.admin.svc.cluster.local 2. A rewrite rule maps public-name → admin.svc.cluster.local 3. An unprivileged pod queries public-name 4. ACL allows the request 5. Rewrite exposes the internal admin service IP This allows unauthorized service discovery and reconnaissance of restricted internal infrastructure. ### Patches _Has the problem been patched? What versions should users upgrade to?_ ### Workarounds - Reorder the default plugin.cfg so that: - rewrite and other normalization plugins run before acl, opa, and firewall - Ensure all access control checks are applied after name normalization.
Read the publisher's advisoryCoreDNS ACL Bypass in github.com/coredns/coredns
Read the publisher's advisoryVendor product
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "coredns",
"product": "coredns",
"versions": [
{
"version": "< 1.14.2",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
datePublished: Mar 6, 2026, 3:36:15 PM
dateUpdated: Jul 15, 2026, 1:15:36 AM
RHSA-2026:25127: Red Hat Security Advisory: Submariner v0.21 security fixes and container updates
CVE-2024-25621 · CVE-2025-61726 · CVE-2025-61728 · CVE-2025-61729 · CVE-2025-68121 · CVE-2025-68151 · CVE-2026-21441 · CVE-2026-25679 · CVE-2026-26017 · CVE-2026-26018 · CVE-2026-32280 · CVE-2026-32936 · CVE-2026-33186 · CVE-2026-34986 · CVE-2026-35579
RHSA-2026:8151: Red Hat Security Advisory: Submariner v0.22 security fixes and container updates
CVE-2025-61726 · CVE-2025-61728 · CVE-2025-61729 · CVE-2025-68121 · CVE-2025-68151 · CVE-2026-21441 · CVE-2026-25679 · CVE-2026-26017 · CVE-2026-26018 · CVE-2026-27137 · CVE-2026-33186
WID-SEC-W-2026-0627: CoreDNS: Mehrere Schwachstellen
CVE-2026-26017 · CVE-2026-26018
openSUSE-SU-2026:20619-1: Security update for coredns
CVE-2025-61726 · CVE-2025-61728 · CVE-2025-61731 · CVE-2025-68119 · CVE-2025-68121 · CVE-2026-26017 · CVE-2026-26018
openSUSE-SU-2026:10297-1: coredns-1.14.2-1.1 on GA media
CVE-2026-26017 · CVE-2026-26018
RHSA-2026:36873: Red Hat Security Advisory: Submariner v0.20 security fixes and container updates
CVE-2025-47950 · CVE-2025-59530 · CVE-2025-61726 · CVE-2025-61729 · CVE-2025-68121 · CVE-2025-68151 · CVE-2026-26017 · CVE-2026-26018 · CVE-2026-44740 · CVE-2026-53488 · CVE-2026-53492
msrc_CVE-2026-26017: CoreDNS ACL Bypass
CVE-2026-26017
No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.
Original source record · Cite this exact observation · Complete original publisher JSON
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Modified
Weakness classifications: CWE-367
published: 2026-03-06T16:16:10.397
lastModified: 2026-07-15T02:18:59.347
The original JSON retains the logical configuration operators, exclusions and version bounds.
No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.
Original source record · Cite this exact observation · Complete original publisher JSON
Go
SEMVER · introduced 0 → fixed 1.14.2
Original source record · Cite this exact observation · Complete original publisher JSON
Go
SEMVER · introduced 0 → fixed 1.14.2
Original source record · Cite this exact observation · Complete original publisher JSON