CVE-2026-24029 (GCVE-0-2026-24029)

Vulnerability from cvelistv5 – Published: 2026-03-31 11:59 – Updated: 2026-03-31 13:15
VLAI
Title
DNS over HTTPS ACL bypass
Summary
When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • Incorrect Authorization
  • CWE-863 - Incorrect Authorization
Assigner
OX
References
Impacted products
Vendor Product Version
PowerDNS DNSdist Affected: 1.9.0 , < 1.9.12 (semver)
Affected: 2.0.0 , < 2.0.3 (semver)
Create a notification for this product.
Date Public
2026-03-30 22:00
Credits
Surya Narayan Kushwaha (aka Cavid)
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-24029",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T13:15:34.638851Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-863",
                "description": "CWE-863 Incorrect Authorization",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-31T13:15:37.448Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.powerdns.com/",
          "defaultStatus": "unaffected",
          "modules": [
            "Incoming DNS over HTTPS"
          ],
          "packageName": "dnsdist",
          "product": "DNSdist",
          "programFiles": [
            "dnsdist-nghttp2-in.cc"
          ],
          "repo": "https://github.com/PowerDNS/pdns",
          "vendor": "PowerDNS",
          "versions": [
            {
              "lessThan": "1.9.12",
              "status": "affected",
              "version": "1.9.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.0.3",
              "status": "affected",
              "version": "2.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Surya Narayan Kushwaha (aka Cavid)"
        }
      ],
      "datePublic": "2026-03-30T22:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eWhen the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.\u003c/p\u003e"
            }
          ],
          "value": "When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-31T11:59:12.903Z",
        "orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
        "shortName": "OX"
      },
      "references": [
        {
          "url": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "DNS over HTTPS ACL bypass",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
    "assignerShortName": "OX",
    "cveId": "CVE-2026-24029",
    "datePublished": "2026-03-31T11:59:12.903Z",
    "dateReserved": "2026-01-20T14:56:25.872Z",
    "dateUpdated": "2026-03-31T13:15:37.448Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-24029",
      "date": "2026-07-31",
      "epss": "0.00148",
      "percentile": "0.04567"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-24029\",\"sourceIdentifier\":\"security@open-xchange.com\",\"published\":\"2026-03-31T12:16:27.633\",\"lastModified\":\"2026-07-25T10:10:00.167\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.\"},{\"lang\":\"es\",\"value\":\"Cuando la opci\u00f3n early_acl_drop (earlyACLDrop en Lua) est\u00e1 deshabilitada (el valor predeterminado es habilitada) en un frontend de DNS sobre HTTPS que utiliza el proveedor nghttp2, la comprobaci\u00f3n de ACL se omite, permitiendo que todos los clientes env\u00eden consultas DoH independientemente de la ACL configurada.\"}],\"affected\":[{\"source\":\"security@open-xchange.com\",\"affectedData\":[{\"vendor\":\"PowerDNS\",\"product\":\"DNSdist\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://repo.powerdns.com/\",\"packageName\":\"dnsdist\",\"modules\":[\"Incoming DNS over HTTPS\"],\"programFiles\":[\"dnsdist-nghttp2-in.cc\"],\"repo\":\"https://github.com/PowerDNS/pdns\",\"versions\":[{\"version\":\"1.9.0\",\"lessThan\":\"1.9.12\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"2.0.0\",\"lessThan\":\"2.0.3\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@open-xchange.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":2.5},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":2.5}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-03-31T13:15:34.638851Z\",\"id\":\"CVE-2026-24029\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-863\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.9.0\",\"versionEndExcluding\":\"1.9.12\",\"matchCriteriaId\":\"628B3B94-81DE-496E-B36A-B79A3DFFE1F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.0.0\",\"versionEndExcluding\":\"2.0.3\",\"matchCriteriaId\":\"9AC850DD-FDD8-4C48-B861-4BBAF423FF57\"}]}]}],\"references\":[{\"url\":\"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html\",\"source\":\"security@open-xchange.com\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-06-28T07:21:33+00:00",
      "cve": "CVE-2026-24029",
      "id": "CVE-2026-24029",
      "initial_release_date": "2026-03-31T11:59:12.903000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dnsdist: dnsdist: Access Control List bypass allows unauthorized DNS over HTTPS queries",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24029.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T05:27:23Z",
      "cve": "CVE-2026-24029",
      "id": "CVE-2026-24029",
      "initial_release_date": "2026-03-31T23:28:19Z",
      "product_status:known_affected": "3",
      "product_status:known_not_affected": "19",
      "product_status:recommended": "8",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-24029",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-24029.json",
      "version": "4"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-24029\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-31T13:15:34.638851Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-31T13:15:30.408Z\"}}], \"cna\": {\"title\": \"DNS over HTTPS ACL bypass\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Surya Narayan Kushwaha (aka Cavid)\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/PowerDNS/pdns\", \"vendor\": \"PowerDNS\", \"modules\": [\"Incoming DNS over HTTPS\"], \"product\": \"DNSdist\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.9.0\", \"lessThan\": \"1.9.12\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"2.0.0\", \"lessThan\": \"2.0.3\", \"versionType\": \"semver\"}], \"packageName\": \"dnsdist\", \"programFiles\": [\"dnsdist-nghttp2-in.cc\"], \"collectionURL\": \"https://repo.powerdns.com/\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-03-30T22:00:00.000Z\", \"references\": [{\"url\": \"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eWhen the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"Incorrect Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"8ce71d90-2354-404b-a86e-bec2cc4e6981\", \"shortName\": \"OX\", \"dateUpdated\": \"2026-03-31T11:59:12.903Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-24029\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-31T13:15:37.448Z\", \"dateReserved\": \"2026-01-20T14:56:25.872Z\", \"assignerOrgId\": \"8ce71d90-2354-404b-a86e-bec2cc4e6981\", \"datePublished\": \"2026-03-31T11:59:12.903Z\", \"assignerShortName\": \"OX\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.