CVE-2026-62309

7.5 highEPSS 0.7%

High (7.5) in coredns.io coredns. EPSS 0.7% chance of exploitation in the next 30 days.

CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11, reassigns addr from a nil readFrom result after parseProxyProtocol errors, and calls addr.String() in the warning log before ServeDNS recovery applies. This issue is fixed in version 1.14.4.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
CWE: CWE-476
Published: 2026-07-16
Modified: 2026-07-22
Record from: the NVD, synced 2026-10-19

Affected

coredns.io:coredns

References

https://github.com/coredns/coredns/commit/60a439dd4febfcd78e3779e952fe3fbf3c16bb1f
https://github.com/coredns/coredns/pull/8154
https://github.com/coredns/coredns/releases/tag/v1.14.4
https://github.com/coredns/coredns/security/advisories/GHSA-9rvv-m5g5-wc8r

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