CVE-2025-68151: CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages

CVE-2025-68151 · Severity: high · CVSS 7.5 · Published 2026-01-08

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.

Technologies: github.com/coredns/coredns (Go). Vendors: Go.

Quick answers

Is CVE-2025-68151 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-68151 being exploited in the wild.
How severe is CVE-2025-68151?
High severity, with a CVSS score of 7.5, published 8 January 2026.
Which products and versions are affected?
github.com/coredns/coredns (Go) SEMVER:introduced=0,fixed=1.14.0.
Is there a fix for CVE-2025-68151?
Yes. github.com/coredns/coredns (Go): upgrade to 1.14.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-68151?
Check whether you run Coredns.Io Coredns or github.com/coredns/coredns (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/coredns/coredns (Go): upgrade to 1.14.0 or later
    go get github.com/coredns/coredns@v1.14.0

Affected products

  • Coredns.Io Coredns
  • github.com/coredns/coredns (Go) SEMVER:introduced=0,fixed=1.14.0

Identifiers

  • CVE-2025-68151
  • GHSA-527x-5wrf-22m2
  • GO-2026-4289

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