FKIE_CVE-2026-31857

Vulnerability from fkie_nvd - Published: 2026-03-11 18:16 - Updated: 2026-06-17 10:34
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Craft is a content management system (CMS). Prior to 5.9.9 and 4.17.4, a Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds() method passes user-controlled string input through renderObjectTemplate() -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.9.9 or 4.17.4 release to mitigate the issue.
References
security-advisories@github.comhttps://github.com/craftcms/cms/commit/8d4903647dcfd31b8d40ed027e27082013347a80Patch
security-advisories@github.comhttps://github.com/craftcms/cms/security/advisories/GHSA-fp5j-j7j4-mcxcPatch, Vendor Advisory
Impacted products
Vendor Product Version
craftcms craft_cms *
craftcms craft_cms *
craftcms craft_cms 4.0.0
craftcms craft_cms 4.0.0
craftcms craft_cms 4.0.0
craftcms craft_cms 4.0.0
craftcms craft_cms 4.0.0
craftcms craft_cms 4.0.0
craftcms craft_cms 4.0.0
craftcms craft_cms 4.0.0
craftcms craft_cms 5.0.0
craftcms craft_cms 5.0.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "cms",
          "vendor": "craftcms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0-RC1, \u003c 5.9.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0-beta.1, \u003c 4.17.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7BFD5346-F567-415B-85F0-56039C3040A5",
              "versionEndExcluding": "4.17.4",
              "versionStartIncluding": "4.0.0.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2C927EB8-ADF2-4A0A-ADA9-8B6C8230D114",
              "versionEndExcluding": "5.9.9",
              "versionStartIncluding": "5.0.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:*",
              "matchCriteriaId": "610F6DE9-720F-45B3-81D5-18E7F6B090FD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:beta1:*:*:*:*:*:*",
              "matchCriteriaId": "90542A12-7090-4C23-AEA5-F6F4964783AC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:beta2:*:*:*:*:*:*",
              "matchCriteriaId": "7DC582DD-53AB-4CF9-961B-50CF5C8DB579",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:beta3:*:*:*:*:*:*",
              "matchCriteriaId": "9C45A1E5-D598-415D-81C9-19AC302BE323",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:beta4:*:*:*:*:*:*",
              "matchCriteriaId": "5515C709-A3D3-4EB1-AA9A-435C63DED7F9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "CC2F40FC-7C27-456A-B16D-679410D1D5CF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "FBAA8227-04F8-404C-907B-B0162B325F5A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "21B28E2C-327A-4CE6-ACAD-97E459712A55",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*",
              "matchCriteriaId": "1C7461CF-35AB-48E1-88B6-956DAE1D2AB4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "8D8E02D1-601A-4E2B-B619-4775BFDB72D0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Craft is a content management system (CMS). Prior to 5.9.9 and 4.17.4, a Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds() method passes user-controlled string input through renderObjectTemplate() -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.9.9 or 4.17.4 release to mitigate the issue."
    },
    {
      "lang": "es",
      "value": "Craft es un sistema de gesti\u00f3n de contenido (CMS). Antes de 5.9.9 y 4.17.4, existe una vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo en el sistema de condiciones de Craft CMS 5. El m\u00e9todo BaseElementSelectConditionRule::getElementIds() pasa una entrada de cadena controlada por el usuario a trav\u00e9s de renderObjectTemplate() -- una funci\u00f3n de renderizado de Twig sin \u0027sandbox\u0027 con el escape deshabilitado. Cualquier usuario autenticado del Panel de Control (incluyendo roles no administrativos como Autor o Editor) puede lograr RCE completa enviando una regla de condici\u00f3n especialmente dise\u00f1ada a trav\u00e9s de los puntos finales est\u00e1ndar de listado de elementos. Esta vulnerabilidad no requiere privilegios de administrador, ni permisos especiales m\u00e1s all\u00e1 del acceso b\u00e1sico al panel de control, y elude todas las configuraciones de endurecimiento de producci\u00f3n (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Los usuarios deben actualizar a la versi\u00f3n parcheada 5.9.9 o 4.17.4 para mitigar el problema."
    }
  ],
  "id": "CVE-2026-31857",
  "lastModified": "2026-06-17T10:34:38.597",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "UNREPORTED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-31857",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-12T14:02:18.692736Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-11T18:16:24.360",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/craftcms/cms/commit/8d4903647dcfd31b8d40ed027e27082013347a80"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-fp5j-j7j4-mcxc"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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