OESA-2026-3184 (CVE-2026-26018)

Vulnerability from osv_openeuler – Published: 2026-07-24 11:12 – Updated: 2026-08-06 11:12 – Source website
VLAI
Summary
coredns security update
Details

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):

CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.(CVE-2026-26018)

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "coredns-1.7.0-1.7.oe2403sp4.aarch64.rpm",
          "coredns-help-1.7.0-1.7.oe2403sp4.aarch64.rpm"
        ],
        "src": [
          "coredns-1.7.0-1.7.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "coredns-1.7.0-1.7.oe2403sp4.x86_64.rpm",
          "coredns-help-1.7.0-1.7.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "coredns",
        "purl": "pkg:rpm/openEuler/coredns\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.0-1.7.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "coredns-1.7.0-1.5.oe2003sp4.aarch64.rpm",
          "coredns-help-1.7.0-1.5.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "coredns-1.7.0-1.5.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "coredns-1.7.0-1.5.oe2003sp4.x86_64.rpm",
          "coredns-help-1.7.0-1.5.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "coredns",
        "purl": "pkg:rpm/openEuler/coredns\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.0-1.5.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "coredns-1.7.0-1.7.oe2203sp4.aarch64.rpm",
          "coredns-help-1.7.0-1.7.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "coredns-1.7.0-1.7.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "coredns-1.7.0-1.7.oe2203sp4.x86_64.rpm",
          "coredns-help-1.7.0-1.7.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "coredns",
        "purl": "pkg:rpm/openEuler/coredns\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.0-1.7.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "coredns-1.7.0-1.7.oe2403sp1.aarch64.rpm",
          "coredns-help-1.7.0-1.7.oe2403sp1.aarch64.rpm"
        ],
        "src": [
          "coredns-1.7.0-1.7.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "coredns-1.7.0-1.7.oe2403sp1.x86_64.rpm",
          "coredns-help-1.7.0-1.7.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "coredns",
        "purl": "pkg:rpm/openEuler/coredns\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.0-1.7.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "coredns-1.7.0-1.7.oe2403sp3.aarch64.rpm",
          "coredns-help-1.7.0-1.7.oe2403sp3.aarch64.rpm"
        ],
        "src": [
          "coredns-1.7.0-1.7.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "coredns-1.7.0-1.7.oe2403sp3.x86_64.rpm",
          "coredns-help-1.7.0-1.7.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "coredns",
        "purl": "pkg:rpm/openEuler/coredns\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.0-1.7.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "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.\r\n\r\nSecurity Fix(es):\n\nCoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS\u0026apos;s loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.(CVE-2026-26018)",
  "id": "OESA-2026-3184",
  "modified": "2026-08-06T11:12:03Z",
  "published": "2026-07-24T11:12:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3184"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26018"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "coredns security update",
  "upstream": [
    "CVE-2026-26018"
  ]
}



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