Vulnerability Details CVE-2026-62299
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 22.3%
CVSS Severity
CVSS v3 Score 5.3
References
- https://github.com/coredns/coredns/commit/fc447d0658b093edc8cd29a6b171216a44a644c2
- https://github.com/coredns/coredns/pull/8190
- https://github.com/coredns/coredns/releases/tag/v1.14.5
- https://github.com/coredns/coredns/security/advisories/GHSA-9pmm-cxww-rrr7
- https://github.com/coredns/coredns/security/advisories/GHSA-9pmm-cxww-rrr7
Products affected by CVE-2026-62299
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cpe:2.3:a:coredns.io:coredns:-
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cpe:2.3:a:coredns.io:coredns:0.9.10
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cpe:2.3:a:coredns.io:coredns:0.9.9
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cpe:2.3:a:coredns.io:coredns:001
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cpe:2.3:a:coredns.io:coredns:1.0.0
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cpe:2.3:a:coredns.io:coredns:1.0.1
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cpe:2.3:a:coredns.io:coredns:1.0.2
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cpe:2.3:a:coredns.io:coredns:1.0.3
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cpe:2.3:a:coredns.io:coredns:1.0.4
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cpe:2.3:a:coredns.io:coredns:1.0.5
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cpe:2.3:a:coredns.io:coredns:1.0.6
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cpe:2.3:a:coredns.io:coredns:1.1.0
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cpe:2.3:a:coredns.io:coredns:1.1.1
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cpe:2.3:a:coredns.io:coredns:1.1.2
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cpe:2.3:a:coredns.io:coredns:1.1.3
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cpe:2.3:a:coredns.io:coredns:1.1.4
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cpe:2.3:a:coredns.io:coredns:1.10.0
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cpe:2.3:a:coredns.io:coredns:1.10.1
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cpe:2.3:a:coredns.io:coredns:1.11.0
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cpe:2.3:a:coredns.io:coredns:1.11.1
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cpe:2.3:a:coredns.io:coredns:1.11.3
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cpe:2.3:a:coredns.io:coredns:1.11.4
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cpe:2.3:a:coredns.io:coredns:1.12.0
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cpe:2.3:a:coredns.io:coredns:1.12.1
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cpe:2.3:a:coredns.io:coredns:1.12.2
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cpe:2.3:a:coredns.io:coredns:1.12.3
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cpe:2.3:a:coredns.io:coredns:1.12.4
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cpe:2.3:a:coredns.io:coredns:1.13.0
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cpe:2.3:a:coredns.io:coredns:1.13.1
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cpe:2.3:a:coredns.io:coredns:1.13.2
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cpe:2.3:a:coredns.io:coredns:1.14.0
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cpe:2.3:a:coredns.io:coredns:1.14.1
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cpe:2.3:a:coredns.io:coredns:1.14.2
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cpe:2.3:a:coredns.io:coredns:1.2.0
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cpe:2.3:a:coredns.io:coredns:1.2.1
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cpe:2.3:a:coredns.io:coredns:1.2.2
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cpe:2.3:a:coredns.io:coredns:1.2.3
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cpe:2.3:a:coredns.io:coredns:1.2.4
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cpe:2.3:a:coredns.io:coredns:1.2.5
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cpe:2.3:a:coredns.io:coredns:1.2.6
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cpe:2.3:a:coredns.io:coredns:1.3.0
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cpe:2.3:a:coredns.io:coredns:1.3.1
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cpe:2.3:a:coredns.io:coredns:1.4.0
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cpe:2.3:a:coredns.io:coredns:1.5.0
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cpe:2.3:a:coredns.io:coredns:1.5.1
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cpe:2.3:a:coredns.io:coredns:1.5.2
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cpe:2.3:a:coredns.io:coredns:1.6.0
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cpe:2.3:a:coredns.io:coredns:1.6.1
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cpe:2.3:a:coredns.io:coredns:1.6.2
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cpe:2.3:a:coredns.io:coredns:1.6.3
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cpe:2.3:a:coredns.io:coredns:1.6.4
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cpe:2.3:a:coredns.io:coredns:1.6.5
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cpe:2.3:a:coredns.io:coredns:1.6.6
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cpe:2.3:a:coredns.io:coredns:1.6.7
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cpe:2.3:a:coredns.io:coredns:1.6.8
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cpe:2.3:a:coredns.io:coredns:1.6.9
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cpe:2.3:a:coredns.io:coredns:1.7.0
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cpe:2.3:a:coredns.io:coredns:1.7.1
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cpe:2.3:a:coredns.io:coredns:1.8.0
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cpe:2.3:a:coredns.io:coredns:1.8.1
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cpe:2.3:a:coredns.io:coredns:1.8.2
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cpe:2.3:a:coredns.io:coredns:1.8.3
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cpe:2.3:a:coredns.io:coredns:1.8.4
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cpe:2.3:a:coredns.io:coredns:1.8.5
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cpe:2.3:a:coredns.io:coredns:1.8.6
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cpe:2.3:a:coredns.io:coredns:1.8.7
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cpe:2.3:a:coredns.io:coredns:1.9.0
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cpe:2.3:a:coredns.io:coredns:1.9.1
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cpe:2.3:a:coredns.io:coredns:1.9.2
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cpe:2.3:a:coredns.io:coredns:1.9.3
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cpe:2.3:a:coredns.io:coredns:1.9.4