Vulnerability-Lookup

GHSA-F4H3-QHG5-J6MQ

Vulnerability from github – Published: 2026-06-21 15:31 – Updated: 2026-08-06 21:56

Summary

Duplicate Advisory: Craft CMS: Authorized asset "preview file" requests bypass allows users without asset access to retrieve private preview metadata

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-44px-qjjc-xrhq. This link is maintained to preserve external references.

Original Description

Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8.

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

5.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-RC1"
            },
            {
              "last_affected": "5.9.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-06T21:56:22Z",
    "nvd_published_at": "2026-06-21T14:16:26Z",
    "severity": "MODERATE"
  },
  "details": "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00a0GHSA-44px-qjjc-xrhq. This link is maintained to preserve external references.\n\n## Original Description\nCraft CMS versions \u003e= 5.0.0-RC1, \u003c= 5.9.13 and \u003e= 4.0.0-RC1, \u003c= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8.",
  "id": "GHSA-f4h3-qhg5-j6mq",
  "modified": "2026-08-06T21:56:22Z",
  "published": "2026-06-21T15:31:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56385"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Duplicate Advisory: Craft CMS: Authorized asset \"preview file\" requests bypass allows users without asset access to retrieve private preview metadata",
  "withdrawn": "2026-08-06T21:56:22Z"
}

CVE-2026-56385 (GCVE-0-2026-56385)

Vulnerability from cvelistv5 – Published: 2026-06-21 13:27 – Updated: 2026-06-22 12:18

Title

Craft CMS - Authorization Bypass in assets/preview-file Endpoint

Summary

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-22 12:18 UTC

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

VulnCheck

References

3 references

URL	Tags
https://github.com/craftcms/cms/security/advisori…	vendor-advisory
https://github.com/craftcms/cms/commit/d30df31122…	patch
https://www.vulncheck.com/advisories/craft-cms-au…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
craftcms	cms	Affected: 5.0.0-RC1 , < 5.9.14 (semver) Unaffected: 5.9.14 (semver) Affected: 4.0.0-RC1 , < 4.17.8 (semver) Unaffected: 4.17.8 (semver)

Date Public

2026-03-24 00:00

Credits

GCXWLP

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-56385",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-22T12:18:03.133816Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-22T12:18:10.953Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:composer/craftcms/cms",
          "product": "cms",
          "vendor": "craftcms",
          "versions": [
            {
              "lessThan": "5.9.14",
              "status": "affected",
              "version": "5.0.0-RC1",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.9.14",
              "versionType": "semver"
            },
            {
              "lessThan": "4.17.8",
              "status": "affected",
              "version": "4.0.0-RC1",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.17.8",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:juzaweb:cms:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.9.14",
                  "versionStartIncluding": "5.0.0-RC1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:juzaweb:cms:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.17.8",
                  "versionStartIncluding": "4.0.0-RC1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "GCXWLP"
        }
      ],
      "datePublic": "2026-03-24T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Craft CMS versions \u003e= 5.0.0-RC1, \u003c= 5.9.13 and \u003e= 4.0.0-RC1, \u003c= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "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:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-21T13:27:01.066Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GHSA Advisory GHSA-44px-qjjc-xrhq",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq"
        },
        {
          "name": "https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27"
        },
        {
          "name": "VulnCheck Advisory: Craft CMS - Authorization Bypass in assets/preview-file Endpoint",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint"
        }
      ],
      "title": "Craft CMS - Authorization Bypass in assets/preview-file Endpoint",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-56385",
    "datePublished": "2026-06-21T13:27:01.066Z",
    "dateReserved": "2026-06-21T02:05:47.495Z",
    "dateUpdated": "2026-06-22T12:18:10.953Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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