Affected by GO-2025-3743
and 9 other vulnerabilities
GO-2025-3743: CoreDNS Vulnerable to DoQ Memory Exhaustion via Stream Amplification in github.com/coredns/coredns
GO-2025-3942: CoreDNS: DNS Cache Pinning via etcd Lease ID Confusion in github.com/coredns/coredns
GO-2026-4289: CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages in github.com/coredns/coredns
GO-2026-4630: CoreDNS ACL Bypass in github.com/coredns/coredns
GO-2026-4635: CoreDNS Loop Detection Denial of Service Vulnerability in github.com/coredns/coredns
GO-2026-4969: CoreDNS' DoQ worker pool does not bound stream backlog in github.com/coredns/coredns
GO-2026-5164: CoreDNS DoH GET oversized dns= query parameter causes pre-validation CPU and memory amplification in github.com/coredns/coredns
GO-2026-5417: CoreDNS' transfer stanza selection uses lexicographic compare (subzone ACL bypass) in github.com/coredns/coredns
GO-2026-5583: CoreDNS has TSIG authentication bypass on DoT, DoH, DoH3, DoQ, and gRPC in github.com/coredns/coredns
GO-2026-5667: CoreDNS has TSIG authentication bypass on gRPC and QUIC transports in github.com/coredns/coredns
Package cache implements a cache. The cache hold 256 shards, each shard
holds a cache: a map with a mutex. There is no fancy expunge algorithm, it
just randomly evicts elements when it gets full.
Add adds a new element to the cache. If the element already exists it is overwritten.
Returns true if an existing element was evicted to make room for this element.
Affected by 
Documentation
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Source Files