CVE-2026-62299 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-62299MEDIUM

CoreDNS: rewrite-plugin EDNS0 response-revert nil-pointer panic (remote DoS) when a downstream plugin returns a response with no OPT record

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  L    5.3   .0031   23.9     —

AFFECTED
  Product  Versions    Fixed
  coredns  < 1.14.5 –  —

TIMELINE
  Jul 13  Reserved by GitHub_M
  Jul 16  EXPLOIT PUBLISHED — CVE-2026-62299 (coredns). Public exploit reference added.
  Jul 16  Published (CNA: GitHub_M)

CWE-476 · CNA: GitHub_M · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 13, 2026	Reserved	Reserved by GitHub_M
July 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-62299 (coredns). Public exploit reference added.
July 16, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
coredns	coredns	—	< 1.14.5	—

Weaknesses

CWE-476

References (4)

https://github.com/coredns/coredns/commit/fc447d0658b093edc8cd29a6b171216a44a644c2 [Patch]
https://github.com/coredns/coredns/pull/8190 [Issue Tracking, Patch]
https://github.com/coredns/coredns/releases/tag/v1.14.5 [Release Notes]
https://github.com/coredns/coredns/security/advisories/GHSA-9pmm-cxww-rrr7 [Exploit, Third Party Advisory]

Authoritative record: CVE-2026-62299 at cve.org

Vendors: coredns

Weaknesses: CWE-476

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-62299 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.