CoreDNS is a DNS server that chains plugins. Prior to version 1.14.0, multiple CoreDNS server implementations (gRPC, HTTPS, and HTTP/3) lack critical resource-limiting controls. An unauthenticated remote attacker can exhaust memory and degrade or crash the server by opening many concurrent connections, streams, or sending oversized request bodies. The issue is similar in nature to CVE-2025-47950 (QUIC DoS) but affects additional server types that do not enforce connection limits, stream limits, or message size constraints. Version 1.14.0 contains a patch.

An update of the coredns package has been released.

ID	Name	Product	Family	Type	Severity
333808	Photon OS 5.0: Coredns PHSA-2026-5.0-91-0869	Nessus	PhotonOS Local Security Checks	Local	high
321834	Photon OS 4.0: Coredns PHSA-2026-4.0-1038	Nessus	PhotonOS Local Security Checks	Local	high
321475	Photon OS 5.0: Coredns PHSA-2026-5.0-0869	Nessus	PhotonOS Local Security Checks	Local	high

Detections

Analytics

CVE-2025-68151

high

Tenable Plugins

high

high

high