High severity7.5NVD Advisory· Published Mar 6, 2026· Updated Jul 15, 2026
CVE-2026-26018
CVE-2026-26018
Description
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/coredns/corednsGo | < 1.14.2 | 1.14.2 |
Affected products
18- osv-coords16 versionspkg:apk/chainguard/eks-distro-coredns-1.31pkg:apk/chainguard/eks-distro-coredns-1.32pkg:apk/chainguard/eks-distro-coredns-1.33pkg:apk/chainguard/eks-distro-coredns-1.34pkg:apk/chainguard/eks-distro-coredns-1.35pkg:apk/chainguard/eks-distro-coredns-fips-1.31pkg:apk/chainguard/eks-distro-coredns-fips-1.32pkg:apk/chainguard/eks-distro-coredns-fips-1.33pkg:apk/chainguard/eks-distro-coredns-fips-1.35pkg:apk/chainguard/kubernetes-dns-node-cachepkg:apk/wolfi/kubernetes-dns-node-cachepkg:golang/github.com/coredns/corednspkg:rpm/opensuse/coredns&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/coredns&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 1.31.43-r2+ 15 more
- (no CPE)range: < 1.31.43-r2
- (no CPE)range: < 1.32.35-r1
- (no CPE)range: < 1.33.25-r1
- (no CPE)range: < 1.34.17-r2
- (no CPE)range: < 1.35.7-r1
- (no CPE)range: < 1.31.43-r2
- (no CPE)range: < 1.32.35-r1
- (no CPE)range: < 1.33.25-r1
- (no CPE)range: < 1.35.7-r1
- (no CPE)range: < 1.26.7-r9
- (no CPE)range: < 1.26.7-r9
- (no CPE)range: < 1.14.2
- (no CPE)range: < 1.14.2-bp160.1.1
- (no CPE)range: < 1.14.2-1.1
- (no CPE)range: < 0.0.20260317T205859-150000.1.152.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
10- github.com/coredns/coredns/security/advisories/GHSA-h75p-j8xm-m278nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-h75p-j8xm-m278ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-26018ghsaADVISORY
- github.com/coredns/coredns/releases/tag/v1.14.2nvdProductRelease NotesWEB
- access.redhat.com/errata/RHSA-2026:25127nvd
- access.redhat.com/errata/RHSA-2026:36873nvd
- access.redhat.com/errata/RHSA-2026:8151nvd
- access.redhat.com/security/cve/CVE-2026-26018nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26018.jsonnvd
News mentions
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