PT-2026-60581 · Coredns · Coredns

CVE-2026-62299 · Published 2026-07-16 · Updated 2026-07-16

Mitre

CVSS v3.1

5.3

Medium

Base vector

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

CoreDNS is a DNS server written in Go. Prior to 1.14.5, the CoreDNS rewrite plugin supports edns0 rewrite rules with an optional revert flag, and two response rules, edns0SetResponseRule and edns0ReplaceResponseRule[T] in plugin/rewrite/edns0.go, call res.IsEdns0() and immediately dereference the returned *dns.OPT without a nil check when a downstream plugin returns a response with no OPT record. A remote, unauthenticated client can send a single ordinary DNS query matching a rewrite edns0 <local|nsid|subnet> <set|append|replace> ... revert rule, causing ResponseReverter in plugin/rewrite/reverter.go to panic, return SERVFAIL, and degrade availability, or crash the CoreDNS process if the debug directive disables recovery. This issue is fixed in version 1.14.5.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-62299

Affected Products

Coredns

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-62299 · Security Note
• https://github.com/coredns/coredns/releases/tag/v1.14.5 · Note
• https://github.com/coredns/coredns/commit/fc447d0658b093edc8cd29a6b171216a44a644c2 · Note
• https://github.com/coredns/coredns/pull/8190 · Note
• https://github.com/coredns/coredns/security/advisories/GHSA-9pmm-cxww-rrr7 · Note