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coredns security update

Type: advisorySource: OSV1 source record

CoreDNS is a fast and flexible DNS server. The key word here is flexible: with CoreDNS you are able to do what you want with your DNS data by utilizing plugins. Security Fix(es): An issue was discovered in CoreDNS through 1.10.1. There is a vulnerability in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing denial of service for normal resolution. In an exploit, the attacker could just forge a response targeting the source port of a vulnerable resolver without the need to guess the correct TXID.(CVE-2023-28452) CoreDNS through 1.10.1 enables attackers to achieve DNS cache poisoning and inject fake responses via a birthday attack.(CVE-2023-30464) CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-HTTPS (DoH) GET path accepts oversized dns= query parameter values and performs URL query parsing, base64 decoding, and DNS message unpacking before rejecting the request. Unlike the POST path, which applies a bounded read via http.MaxBytesReader limited to 65536 bytes, the GET path has no equivalent size validation before expensive processing. A remote, unauthenticated attacker can repeatedly send oversized DoH GET requests to force high CPU usage, large transient memory allocations, and elevated garbage-collection pressure, leading to denial of service. This issue has been fixed in version 1.14.3.(CVE-2026-32936)

Announced Source revision 1
Original source ↗

OESA-2026-4018

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:OESA-2026-4018

coredns

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
1.7.0-1.10.oe2403sp3

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

coredns

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
1.7.0-1.10.oe2403sp4

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

coredns

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
1.7.0-1.7.oe2003sp4

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

coredns

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
1.7.0-1.9.oe2203sp4

Source reference: /affected/3/ranges

Prerequisites
Not stated in this record

coredns

Source reference: /affected/4/package/name

Affected versions
Not stated in this record
Fixed versions
1.7.0-1.10.oe2403sp1

Source reference: /affected/4/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.7.0-1.10.oe2403sp3"
          }
        ]
      }
    ],
    "package": {
      "name": "coredns",
      "purl": "pkg:rpm/openEuler/coredns&distro=openEuler-24.03-LTS-SP3",
      "ecosystem": "openEuler:24.03-LTS-SP3"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
    },
    "ecosystem_specific": {
      "src": [
        "coredns-1.7.0-1.10.oe2403sp3.src.rpm"
      ],
      "x86_64": [
        "coredns-1.7.0-1.10.oe2403sp3.x86_64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp3.x86_64.rpm"
      ],
      "aarch64": [
        "coredns-1.7.0-1.10.oe2403sp3.aarch64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp3.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.7.0-1.10.oe2403sp4"
          }
        ]
      }
    ],
    "package": {
      "name": "coredns",
      "purl": "pkg:rpm/openEuler/coredns&distro=openEuler-24.03-LTS-SP4",
      "ecosystem": "openEuler:24.03-LTS-SP4"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
    },
    "ecosystem_specific": {
      "src": [
        "coredns-1.7.0-1.10.oe2403sp4.src.rpm"
      ],
      "x86_64": [
        "coredns-1.7.0-1.10.oe2403sp4.x86_64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp4.x86_64.rpm"
      ],
      "aarch64": [
        "coredns-1.7.0-1.10.oe2403sp4.aarch64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp4.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.7.0-1.7.oe2003sp4"
          }
        ]
      }
    ],
    "package": {
      "name": "coredns",
      "purl": "pkg:rpm/openEuler/coredns&distro=openEuler-20.03-LTS-SP4",
      "ecosystem": "openEuler:20.03-LTS-SP4"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
    },
    "ecosystem_specific": {
      "src": [
        "coredns-1.7.0-1.7.oe2003sp4.src.rpm"
      ],
      "x86_64": [
        "coredns-1.7.0-1.7.oe2003sp4.x86_64.rpm",
        "coredns-help-1.7.0-1.7.oe2003sp4.x86_64.rpm"
      ],
      "aarch64": [
        "coredns-1.7.0-1.7.oe2003sp4.aarch64.rpm",
        "coredns-help-1.7.0-1.7.oe2003sp4.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.7.0-1.9.oe2203sp4"
          }
        ]
      }
    ],
    "package": {
      "name": "coredns",
      "purl": "pkg:rpm/openEuler/coredns&distro=openEuler-22.03-LTS-SP4",
      "ecosystem": "openEuler:22.03-LTS-SP4"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
    },
    "ecosystem_specific": {
      "src": [
        "coredns-1.7.0-1.9.oe2203sp4.src.rpm"
      ],
      "x86_64": [
        "coredns-1.7.0-1.9.oe2203sp4.x86_64.rpm",
        "coredns-help-1.7.0-1.9.oe2203sp4.x86_64.rpm"
      ],
      "aarch64": [
        "coredns-1.7.0-1.9.oe2203sp4.aarch64.rpm",
        "coredns-help-1.7.0-1.9.oe2203sp4.aarch64.rpm"
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.7.0-1.10.oe2403sp1"
          }
        ]
      }
    ],
    "package": {
      "name": "coredns",
      "purl": "pkg:rpm/openEuler/coredns&distro=openEuler-24.03-LTS-SP1",
      "ecosystem": "openEuler:24.03-LTS-SP1"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
    },
    "ecosystem_specific": {
      "src": [
        "coredns-1.7.0-1.10.oe2403sp1.src.rpm"
      ],
      "x86_64": [
        "coredns-1.7.0-1.10.oe2403sp1.x86_64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp1.x86_64.rpm"
      ],
      "aarch64": [
        "coredns-1.7.0-1.10.oe2403sp1.aarch64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp1.aarch64.rpm"
      ]
    }
  }
]

Publisher severity

high

Source reference: /database_specific/severity

Event
#14648 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement