Vulnerability-Lookup

GHSA-F74W-488G-8X5R

Vulnerability from github – Published: 2026-07-06 21:37 – Updated: 2026-07-06 21:37

Summary

Craft CMS: Potential authenticated Remote Code Execution via referrer redirect

Details

Requirements:

Control panel access
Permissions to edit an entry

Details

Control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header.

The issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via renderObjectTemplate(), and while a sandboxed alternative already exists (renderSandboxedObjectTemplate()), it is not used in this case. This signed URL can be specified by users, as it is reflected in the “Referer” HTTP request header, which is under attacker control.

This has been fixed in Craft 5.10.0. Affected users should update to that version or higher to get the fix.

Resources

https://github.com/craftcms/cms/pull/18680

Severity

8.7 (High)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.9.0"
            },
            {
              "fixed": "5.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55794"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-06T21:37:06Z",
    "nvd_published_at": "2026-07-02T00:16:45Z",
    "severity": "HIGH"
  },
  "details": "### Requirements:\n\n* Control panel access\n* Permissions to edit an entry\n\n### Details\n\nControl panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header.\n\nThe issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via `renderObjectTemplate()`, and while a sandboxed alternative already exists (`renderSandboxedObjectTemplate()`), it is not used in this case. This signed URL can be specified by users, as it is reflected in the \u201cReferer\u201d HTTP request header, which is under attacker control.\n\nThis has been fixed in Craft 5.10.0. Affected users should update to that version or higher to get the fix.\n\n### Resources\n\nhttps://github.com/craftcms/cms/pull/18680",
  "id": "GHSA-f74w-488g-8x5r",
  "modified": "2026-07-06T21:37:06Z",
  "published": "2026-07-06T21:37:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-f74w-488g-8x5r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55794"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/pull/18680"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft CMS: Potential authenticated Remote Code Execution via referrer redirect"
}

CVE-2026-55794 (GCVE-0-2026-55794)

Vulnerability from cvelistv5 – Published: 2026-07-01 23:26 – Updated: 2026-07-02 12:41

Title

Craft CMS: Potential authenticated Remote Code Execution via referrer redirect

Summary

Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header, potentially leading to authenticated RCE. The issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via renderObjectTemplate(), and while a sandboxed alternative already exists (renderSandboxedObjectTemplate()), it is not used in this case. This signed URL can be specified by users, as it is reflected in the “Referer” HTTP request header, which is under attacker control. This issue has been fixed in version 5.10.0.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-02 12:41 UTC

CWE

CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7642 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/craftcms/cms/security/advisori…	x_refsource_CONFIRM
https://github.com/craftcms/cms/pull/18680	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
craftcms	cms	Affected: >= 5.9.0, < 5.10.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55794",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-02T12:41:30.954619Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-02T12:41:39.752Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "cms",
          "vendor": "craftcms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.9.0, \u003c 5.10.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header, potentially leading to authenticated RCE. The issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via renderObjectTemplate(), and while a sandboxed alternative already exists (renderSandboxedObjectTemplate()), it is not used in this case. This signed URL can be specified by users, as it is reflected in the \u201cReferer\u201d HTTP request header, which is under attacker control. This issue has been fixed in version 5.10.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1336",
              "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-01T23:26:22.071Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/craftcms/cms/security/advisories/GHSA-f74w-488g-8x5r",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/craftcms/cms/security/advisories/GHSA-f74w-488g-8x5r"
        },
        {
          "name": "https://github.com/craftcms/cms/pull/18680",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/craftcms/cms/pull/18680"
        }
      ],
      "source": {
        "advisory": "GHSA-f74w-488g-8x5r",
        "discovery": "UNKNOWN"
      },
      "title": "Craft CMS: Potential authenticated Remote Code Execution via referrer redirect"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55794",
    "datePublished": "2026-07-01T23:26:22.071Z",
    "dateReserved": "2026-06-17T14:40:28.380Z",
    "dateUpdated": "2026-07-02T12:41:39.752Z",
    "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-F74W-488G-8X5R

Requirements:

Details

Resources

CVE-2026-55794 (GCVE-0-2026-55794)

Tags

Sightings

Nomenclature

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