Vulnerability-Lookup

CVE-2026-16644 (GCVE-0-2026-16644)

Vulnerability from cvelistv5 – Published: 2026-08-25 22:21 – Updated: 2026-08-26 18:40

Title

Webform REST - Moderately critical - Access bypass - SA-CONTRIB-2026-087

Summary

Incorrect Authorization vulnerability in Drupal Webform REST allows Forceful Browsing. This issue affects Webform REST versions: from 0.0.0 to 4.1.0.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 18:39 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

drupal mitre root

References

1 reference

URL	Tags
https://www.drupal.org/sa-contrib-2026-087

Impacted products

1 product

Vendor	Product	Version	CPE status
Drupal	Webform REST	Affected: 0.0.0 , < 4.1.0 (semver)	guessed

Date Public

2026-07-22 18:00

Credits

Giuseppe (giuseppe87) Dan Chadwick (danchadwick) Giuseppe (giuseppe87) Jacob Rockowitz (jrockowitz) Liam Morland (liam morland) Nelson Alves (nsalves) Anna Kalata (akalata) cilefen (cilefen) Greg Knaddison (greggles) Michael Hess (mlhess) Juraj Nemec (poker10)

Show details on NVD website

JSON

To clipboard

{
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        },
        {
          "lang": "en",
          "type": "coordinator",
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        },
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      ],
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drupal-contrib-2026-087

Vulnerability from drupal

Published

2026-07-22 18:00

Modified

2026-07-22 20:57

Summary

Details

This module enables you to retrieve and submit webform submissions via REST endpoints.

The module doesn't sufficiently check the parent webform's permissions for creating, viewing and updating permissions.

This vulnerability is mitigated by the fact that an attacker must already have permissions to use the rest resource.

This advisory only affects already-unsupported versions 4.0.3 and earlier.

Credits

Giuseppe (giuseppe87) www.drupal.org/u/giuseppe87

References

URL

Type

https://www.drupal.org/sa-contrib-2026-087

WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "affected_versions": "\u003c4.1.0"
      },
      "package": {
        "ecosystem": "Packagist:https://packages.drupal.org/8",
        "name": "drupal/webform_rest"
      },
      "ranges": [
        {
          "database_specific": {
            "constraint": "\u003c4.1.0"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": []
    }
  ],
  "aliases": [
    "CVE-2026-16644"
  ],
  "credits": [
    {
      "contact": [
        "https://www.drupal.org/u/giuseppe87"
      ],
      "name": "Giuseppe  (giuseppe87)"
    }
  ],
  "details": "This module enables you to retrieve and submit webform submissions via REST endpoints.\n\nThe module doesn\u0027t sufficiently check the parent webform\u0027s permissions for creating, viewing and updating permissions.\n\nThis vulnerability is mitigated by the fact that an attacker must already have permissions to use the rest resource.\n\nThis advisory only affects already-unsupported versions 4.0.3 and earlier.",
  "id": "DRUPAL-CONTRIB-2026-087",
  "modified": "2026-07-22T20:57:07.000Z",
  "published": "2026-07-22T18:00:53.000Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2026-087"
    }
  ],
  "schema_version": "1.7.0"
}

FKIE_CVE-2026-16644

Vulnerability from fkie_nvd - Published: 2026-08-25 23:16 - Updated: 2026-08-26 20:17

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Summary

Incorrect Authorization vulnerability in Drupal Webform REST allows Forceful Browsing. This issue affects Webform REST versions: from 0.0.0 to 4.1.0.

References

	URL	Tags
	mlhess@drupal.org	https://www.drupal.org/sa-contrib-2026-087

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.drupal.org/project/webform_rest",
          "product": "Webform REST",
          "repo": "https://git.drupalcode.org/project/webform_rest",
          "vendor": "Drupal",
          "versions": [
            {
              "lessThan": "4.1.0",
              "status": "affected",
              "version": "0.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "mlhess@drupal.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
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    }
  ],
  "id": "CVE-2026-16644",
  "lastModified": "2026-08-26T20:17:02.277",
  "metrics": {
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
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        },
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        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
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    "ssvcV203": [
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        }
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  "published": "2026-08-25T23:16:57.200",
  "references": [
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      "source": "mlhess@drupal.org",
      "url": "https://www.drupal.org/sa-contrib-2026-087"
    }
  ],
  "sourceIdentifier": "mlhess@drupal.org",
  "vulnStatus": "Received",
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    {
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        {
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          "value": "CWE-863"
        }
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    }
  ]
}

GHSA-6FWM-VRGX-RJW7

Vulnerability from github – Published: 2026-08-26 00:31 – Updated: 2026-08-26 21:31

Details

Incorrect Authorization vulnerability in Drupal Webform REST allows Forceful Browsing. This issue affects Webform REST versions: from 0.0.0 to 4.1.0.

Severity

9.1 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-16644"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T23:16:57Z",
    "severity": "CRITICAL"
  },
  "details": "Incorrect Authorization vulnerability in Drupal Webform REST allows Forceful Browsing. This issue affects Webform REST versions: from 0.0.0 to 4.1.0.",
  "id": "GHSA-6fwm-vrgx-rjw7",
  "modified": "2026-08-26T21:31:40Z",
  "published": "2026-08-26T00:31:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16644"
    },
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2026-087"
    }
  ],
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  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

CVE-2026-16644 (GCVE-0-2026-16644)

drupal-contrib-2026-087

Vulnerability from drupal

FKIE_CVE-2026-16644

GHSA-6FWM-VRGX-RJW7

Tags

Sightings

Nomenclature