CVE-2025-58063: Coredns

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

CoreDNS is a DNS server that chains plugins. Starting in version 1.2.0 and prior to version 1.12.4, the CoreDNS etcd plugin contains a TTL confusion vulnerability where lease IDs are incorrectly used as TTL values, enabling DNS cache pinning attacks. This effectively creates a DoS condition for DNS resolution of affected services. The `TTL()` function in `plugin/etcd/etcd.go` incorrectly casts etcd lease IDs (64-bit integers) to uint32 and uses them as TTL values. Large lease IDs become very large TTLs when cast to uint32. This enables cache pinning attacks. Version 1.12.4 contains a fix for the issue.

Affected products

• Coredns Coredns: from 1.2.0, before 1.12.4 (fixed in 1.12.4)

Published 2025-09-09. Last modified 2026-06-17.