Vulnerability · Published Jan 8, 2026 · Assigned by GitHub_M
CVE-2025-68151CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages
Medium 6.6
In plain English
A medium-severity resource allocation without limits in coredns from coredns. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/coredns/coredns | 1.14.0 | GHSA-527x-5wrf-22m2 |
| Go | github.com/coredns/coredns | 1.14.0 | GO-2026-4289 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
References
- https://github.com/coredns/coredns/security/advisories/GHSA-527x-5wrf-22m2 x_refsource_CONFIRM
- https://github.com/coredns/coredns/pull/7490 x_refsource_MISC
- https://github.com/coredns/coredns/commit/0d8cbb1a6bcb6bc9c1a489865278b8725fa20812 x_refsource_MISC