Vulnerability-Lookup

CVE-2026-27126 (GCVE-0-2026-27126)

Vulnerability from cvelistv5 – Published: 2026-02-24 02:30 – Updated: 2026-02-24 19:35

Title

Craft CMS has Stored XSS in Table Field via "HTML" Column Type

Summary

Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a stored Cross-site Scripting (XSS) vulnerability exists in the `editableTable.twig` component when using the `html` column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field. In order to exploit the vulnerability, an attacker must have an administrator account, and `allowAdminChanges` must be enabled in production, which is against Craft's security recommendations. Versions 4.16.19 and 5.8.23 patch the issue.

Severity

5.9 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-24 19:33 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7664 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/commit/f5d488d9bb…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
craftcms	cms	Affected: >= 4.5.0-RC1, < 4.16.19 Affected: >= 5.0.0-RC1, < 5.8.23	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-27126

Vulnerability from fkie_nvd - Published: 2026-02-24 03:16 - Updated: 2026-06-17 10:26

Severity

4.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/craftcms/cms/commit/f5d488d9bb6eff7670ed2c2fe30e15692e92c52b	Patch
	security-advisories@github.com	https://github.com/craftcms/cms/security/advisories/GHSA-3jh3-prx3-w6wc	Third Party Advisory

Impacted products

Vendor	Product	Version
craftcms	craft_cms	*
craftcms	craft_cms	*
craftcms	craft_cms	4.5.0
craftcms	craft_cms	4.5.0
craftcms	craft_cms	5.0.0
craftcms	craft_cms	5.0.0

JSON

To clipboard

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              "matchCriteriaId": "8D8E02D1-601A-4E2B-B619-4775BFDB72D0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a stored Cross-site Scripting (XSS) vulnerability exists in the `editableTable.twig` component when using the `html` column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field. In order to exploit the vulnerability, an attacker must have an administrator account, and `allowAdminChanges` must be enabled in production, which is against Craft\u0027s security recommendations. Versions 4.16.19 and 5.8.23 patch the issue."
    },
    {
      "lang": "es",
      "value": "Craft es un sistema de gesti\u00f3n de contenido (CMS). En las versiones 4.5.0-RC1 a 4.16.18 y 5.0.0-RC1 a 5.8.22, existe una vulnerabilidad de cross-site scripting (XSS) almacenado en el componente \u0027editableTable.twig\u0027 al usar el tipo de columna \u0027html\u0027. La aplicaci\u00f3n no sanitiza la entrada, permitiendo a un atacante ejecutar JavaScript arbitrario cuando otro usuario ve una p\u00e1gina con el campo de tabla malicioso. Para explotar la vulnerabilidad, un atacante debe tener una cuenta de administrador, y \u0027allowAdminChanges\u0027 debe estar habilitado en producci\u00f3n, lo cual va en contra de las recomendaciones de seguridad de Craft. Las versiones 4.16.19 y 5.8.23 parchean el problema."
    }
  ],
  "id": "CVE-2026-27126",
  "lastModified": "2026-06-17T10:26:42.777",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.7,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "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": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:H/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-27126",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-24T19:33:58.093384Z",
          "version": "2.0.3"
        }
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    ]
  },
  "published": "2026-02-24T03:16:02.267",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
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      "url": "https://github.com/craftcms/cms/commit/f5d488d9bb6eff7670ed2c2fe30e15692e92c52b"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-3jh3-prx3-w6wc"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-3JH3-PRX3-W6WC

Vulnerability from github – Published: 2026-02-23 22:15 – Updated: 2026-02-24 16:08

Summary

Craft CMS has Stored XSS in Table Field via "HTML" Column Type

Details

A stored Cross-site Scripting (XSS) vulnerability exists in the editableTable.twig component when using the html column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field.

Prerequisites

An administrator account
allowAdminChanges must be enabled in production, which is against our security recommendations.

Steps to Reproduce

Navigate to Settings → Fields and create a new field with Type: Table
Add a Column Heading and set Column Type to Single-line text
- Note: The vulnerable Column Type is html, but it's not available in the UI dropdown.
In Default Values section, add a row with the following payload: html <img src=x onerror="alert('XSS')">
Enable Static Rows
Intercept the Save Field request using a proxy tool (e.g., Burp Suite) or use cURL directly
Modify the request body and change the types[craft-fields-Table][columns][col3][type] parameter from singleline to html
Forward the request to save the field
Use the field in any object (e.g. user profile fields) → then visit the any user's profile
Notice the XSS execution
The XSS will also trigger when an administrator attempts to edit this field, as the malicious payload is executed within the field configuration page, too.

Resources

https://github.com/craftcms/cms/commit/f5d488d9bb6eff7670ed2c2fe30e15692e92c52b

Severity

5.9 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.16.18"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.5.0-RC1"
            },
            {
              "fixed": "4.16.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.8.22"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-RC1"
            },
            {
              "fixed": "5.8.23"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-27126"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-23T22:15:03Z",
    "nvd_published_at": "2026-02-24T03:16:02Z",
    "severity": "MODERATE"
  },
  "details": "A stored Cross-site Scripting (XSS) vulnerability exists in the `editableTable.twig` component when using the `html` column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field.\n\n## Prerequisites\n* An administrator account\n* `allowAdminChanges` must be enabled in production, which is [against our security recommendations](https://craftcms.com/knowledge-base/securing-craft#set-allowAdminChanges-to-false-in-production).\n\n## Steps to Reproduce\n1. Navigate to **Settings** \u2192 **Fields** and create a new field with Type: **Table**\n1. Add a **Column Heading** and set **Column Type** to `Single-line text`\n    - **Note:** The vulnerable **Column Type** is `html`, but it\u0027s not available in the UI dropdown.\n1. In **Default Values** section, add a row with the following payload:\n    ```html\n    \u003cimg src=x onerror=\"alert(\u0027XSS\u0027)\"\u003e\n    ```\n1. Enable `Static Rows`\n1. Intercept the **Save Field** request using a proxy tool (e.g., Burp Suite) or use `cURL` directly\n1. Modify the request body and change the `types[craft-fields-Table][columns][col3][type]` parameter from `singleline` to `html`\n1. Forward the request to save the field\n1. Use the field in any object (e.g. user profile fields) \u2192 then visit the any user\u0027s profile\n1. Notice the XSS execution\n1. The XSS will also trigger when an administrator attempts to edit this field, as the malicious payload is executed within the field configuration page, too.\n\n## Resources\n\nhttps://github.com/craftcms/cms/commit/f5d488d9bb6eff7670ed2c2fe30e15692e92c52b",
  "id": "GHSA-3jh3-prx3-w6wc",
  "modified": "2026-02-24T16:08:41Z",
  "published": "2026-02-23T22:15:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-3jh3-prx3-w6wc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27126"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/commit/f5d488d9bb6eff7670ed2c2fe30e15692e92c52b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft CMS has Stored XSS in Table Field via \"HTML\" Column Type"
}

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.

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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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Action not permitted

CVE-2026-27126 (GCVE-0-2026-27126)

FKIE_CVE-2026-27126

GHSA-3JH3-PRX3-W6WC

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