Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| coredns | coredns | < 1.14.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | coredns | 1.14.2-1.1 | openSUSE-SU-2026:10297-1 |
| openSUSE Leap 16.0 | coredns | 1.14.2-bp160.1.1 | openSUSE-SU-2026:20619-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20260317T205859-150000.1.152.1 | SUSE-SU-2026:1042-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | coredns | 1.11.4-15 | — |
| Azure Linux 2 (CBL-Mariner) | coredns | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | coredns-1.13 +1 | No fix yet | — |
| Wolfi rolling | juicefs-1.3 | 1.3.1-r8 | — |
| Wolfi rolling | k8s_gateway | 1.6.4-r2 | — |
| Wolfi rolling | kubernetes-dns-node-cache | 1.26.7-r9 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/coredns/coredns | < 1.14.2 | 1.14.2 | GHSA-c9v3-4pv7-87pr |
Advisories 5
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- WID-SEC-2026-0627 CoreDNS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 8, 2026
- openSUSE-SU-2026:20619-1 Security update for coredns SUSE / openSUSE Security Updates · Apr 25, 2026
- SUSE-SU-2026:1042-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Mar 26, 2026
- openSUSE-SU-2026:10297-1 coredns-1.14.2-1.1 on GA media SUSE / openSUSE Security Updates · Mar 8, 2026