FKIE_CVE-2026-9334

Vulnerability from fkie_nvd - Published: 2026-06-03 01:16 - Updated: 2026-07-21 19:10
Severity
7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Summary
Cpanel::JSON::XS versions before 4.41 for Perl allow type confusion via duplicate object keys when dupkeys_as_arrayref is enabled. decode_hv() collapses duplicate object keys into an array reference under dupkeys_as_arrayref. The branch reached for a duplicate key tests `SvTYPE (old_value) != SVt_RV && SvTYPE (SvRV (old_value)) != SVt_PVAV`, which evaluates SvRV(old_value) before establishing that old_value is a reference. When the existing value is a plain scalar rather than an array reference, a non-reference scalar is dereferenced as a reference. A caller decoding untrusted JSON with dupkeys_as_arrayref enabled is crashed, and the incompatible access follows a pointer taken from attacker controlled scalar contents.
References
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/rurban/Cpanel-JSON-XS/commit/11a7c550a0d8fac2f84414f24d5df9b2bfe346e2.patchPatch
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.41/changesRelease Notes
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/06/03/4Mailing List, Patch, Third Party Advisory
Impacted products
Vendor Product Version
rurban cpanel\ \
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Cpanel-JSON-XS",
          "product": "Cpanel::JSON::XS",
          "programFiles": [
            "XS.xs"
          ],
          "programRoutines": [
            {
              "name": "decode_hv"
            }
          ],
          "repo": "https://github.com/rurban/Cpanel-JSON-XS",
          "vendor": "RURBAN",
          "versions": [
            {
              "lessThan": "4.41",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rurban:cpanel\\:\\:json\\:\\:xs:*:*:*:*:*:perl:*:*",
              "matchCriteriaId": "41C09D6F-C2F2-42BF-9734-B6F7D9E02777",
              "versionEndExcluding": "4.41",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cpanel::JSON::XS versions before 4.41 for Perl allow type confusion via duplicate object keys when dupkeys_as_arrayref is enabled.\n\ndecode_hv() collapses duplicate object keys into an array reference under dupkeys_as_arrayref. The branch reached for a duplicate key tests `SvTYPE (old_value) != SVt_RV \u0026\u0026 SvTYPE (SvRV (old_value)) != SVt_PVAV`, which evaluates SvRV(old_value) before establishing that old_value is a reference. When the existing value is a plain scalar rather than an array reference, a non-reference scalar is dereferenced as a reference.\n\nA caller decoding untrusted JSON with dupkeys_as_arrayref enabled is crashed, and the incompatible access follows a pointer taken from attacker controlled scalar contents."
    },
    {
      "lang": "es",
      "value": "Las versiones de Cpanel::JSON::XS anteriores a la 4.41 para Perl permiten confusi\u00f3n de tipos a trav\u00e9s de claves de objeto duplicadas cuando dupkeys_as_arrayref est\u00e1 habilitado.\n\ndecode_hv() colapsa las claves de objeto duplicadas en una referencia de array bajo dupkeys_as_arrayref. La rama alcanzada para una clave duplicada prueba \u0027SvTYPE (old_value) != SVt_RV \u0026\u0026 SvTYPE (SvRV (old_value)) != SVt_PVAV\u0027, que eval\u00faa SvRV(old_value) antes de establecer que old_value es una referencia. Cuando el valor existente es un escalar simple en lugar de una referencia de array, un escalar no referenciado es desreferenciado como una referencia.\n\nUn llamador que decodifica JSON no confiable con dupkeys_as_arrayref habilitado se bloquea, y el acceso incompatible sigue un puntero tomado de contenidos escalares controlados por el atacante."
    }
  ],
  "id": "CVE-2026-9334",
  "lastModified": "2026-07-21T19:10:00.107",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "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:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9334",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-03T17:29:35.774276Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-03T01:16:23.287",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/rurban/Cpanel-JSON-XS/commit/11a7c550a0d8fac2f84414f24d5df9b2bfe346e2.patch"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "tags": [
        "Release Notes"
      ],
      "url": "https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.41/changes"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2026/06/03/4"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-843"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}



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