CoreDNS DNS-over-QUIC unbounded goroutine growth leads to denial of service

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-32934 · CVE overview and exploitation status

EUVD-2026-27440

GHSA-2wpx-qpw2-g5h5

GO-2026-4969

cve-program · CVE-2026-32934

• https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5
• https://github.com/coredns/coredns/releases/tag/v1.14.3

euvd · EUVD-2026-27440

• https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5
• https://github.com/coredns/coredns/releases/tag/v1.14.3

nvd · CVE-2026-32934

• https://github.com/coredns/coredns/releases/tag/v1.14.3
• https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5

osv · GHSA-2wpx-qpw2-g5h5

• https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5
• https://github.com/coredns/coredns/security/advisories/GHSA-cvx7-x8pj-x2gw
• https://nvd.nist.gov/vuln/detail/CVE-2026-32934
• https://github.com/coredns/coredns
• https://github.com/coredns/coredns/releases/tag/v1.14.3

osv · GO-2026-4969

• https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5
• https://nvd.nist.gov/vuln/detail/CVE-2026-32934
• https://github.com/coredns/coredns/releases/tag/v1.14.3
• https://github.com/coredns/coredns/security/advisories/GHSA-cvx7-x8pj-x2gw

• CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can be driven into unbounded goroutine and memory growth by a remote client that opens many QUIC streams and sends only 1 byte per stre… · Advisory content revised · 15 Nov 2026