Vulnerability-Lookup

CVE-2026-18259 (GCVE-0-2026-18259)

Vulnerability from cvelistv5 – Published: 2026-08-25 22:21 – Updated: 2026-08-26 18:42

Title

Token Content Access - Moderately critical - Access bypass - SA-CONTRIB-2026-090

Summary

Observable Timing Discrepancy vulnerability in Drupal Token Content Access allows Brute Force. This issue affects Token Content Access versions: from 0.0.0 to 3.1.2.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 18:42 UTC

CWE

CWE-208 - Observable Timing Discrepancy

Assigner

drupal mitre root

References

1 reference

URL	Tags
https://www.drupal.org/sa-contrib-2026-090

Impacted products

1 product

Vendor	Product	Version	CPE status
Drupal	Token Content Access	Affected: 0.0.0 , < 3.1.2 (semver)	guessed

Date Public

2026-07-29 17:08

Credits

Robin (robincs) Kyrylo Loboda (lobodakyrylo) Bram Driesen (bramdriesen) cilefen (cilefen) Greg Knaddison (greggles) Juraj Nemec (poker10) Swan Kalata (akalata)

Show details on NVD website

JSON

To clipboard

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          "value": "Bram Driesen (bramdriesen)"
        },
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          "type": "coordinator",
          "value": "cilefen  (cilefen)"
        },
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        {
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          "type": "coordinator",
          "value": "Juraj Nemec (poker10)"
        },
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    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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drupal-contrib-2026-090

Vulnerability from drupal

Published

2026-07-29 17:08

Modified

2026-07-29 17:08

Summary

Details

The Token Content Access module enables site administrators to provide access to content using access tokens.

The module does not sufficiently protect access token comparison in some cases. This could allow a persistent attacker to use a timing attack to guess a valid access token and bypass access restrictions for content protected by this module.

This vulnerability is mitigated by the fact that an attacker must know or discover a URL for content protected by Token Content Access, and exploiting the issue requires measuring timing differences in token comparison responses.

Credits

Robin (robincs) www.drupal.org/u/robincs

References

URL

Type

https://www.drupal.org/sa-contrib-2026-090

WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "affected_versions": "\u003c3.1.2"
      },
      "package": {
        "ecosystem": "Packagist:https://packages.drupal.org/8",
        "name": "drupal/tca"
      },
      "ranges": [
        {
          "database_specific": {
            "constraint": "\u003c3.1.2"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": []
    }
  ],
  "aliases": [
    "CVE-2026-18259"
  ],
  "credits": [
    {
      "contact": [
        "https://www.drupal.org/u/robincs"
      ],
      "name": "Robin  (robincs)"
    }
  ],
  "details": "The Token Content Access module enables site administrators to provide access to content using access tokens.\n\nThe module does not sufficiently protect access token comparison in some cases. This could allow a persistent attacker to use a timing attack to guess a valid access token and bypass access restrictions for content protected by this module.\n\nThis vulnerability is mitigated by the fact that an attacker must know or discover a URL for content protected by Token Content Access, and exploiting the issue requires measuring timing differences in token comparison responses.",
  "id": "DRUPAL-CONTRIB-2026-090",
  "modified": "2026-07-29T17:08:33.000Z",
  "published": "2026-07-29T17:08:33.000Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2026-090"
    }
  ],
  "schema_version": "1.7.0"
}

FKIE_CVE-2026-18259

Vulnerability from fkie_nvd - Published: 2026-08-25 23:16 - Updated: 2026-08-28 15:29

Severity

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

Summary

Observable Timing Discrepancy vulnerability in Drupal Token Content Access allows Brute Force. This issue affects Token Content Access versions: from 0.0.0 to 3.1.2.

References

	URL	Tags
	mlhess@drupal.org	https://www.drupal.org/sa-contrib-2026-090

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.drupal.org/project/tca",
          "product": "Token Content Access",
          "repo": "https://git.drupalcode.org/project/tca",
          "vendor": "Drupal",
          "versions": [
            {
              "lessThan": "3.1.2",
              "status": "affected",
              "version": "0.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "mlhess@drupal.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Observable Timing Discrepancy vulnerability in Drupal Token Content Access allows Brute Force. This issue affects Token Content Access versions: from 0.0.0 to 3.1.2."
    }
  ],
  "id": "CVE-2026-18259",
  "lastModified": "2026-08-28T15:29:44.967",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "options": [
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  "published": "2026-08-25T23:16:57.600",
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      "source": "mlhess@drupal.org",
      "url": "https://www.drupal.org/sa-contrib-2026-090"
    }
  ],
  "sourceIdentifier": "mlhess@drupal.org",
  "vulnStatus": "Awaiting Analysis",
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    {
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        {
          "lang": "en",
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        }
      ],
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      "type": "Secondary"
    }
  ]
}

GHSA-PRXM-C7P3-5GV7

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

Details

Observable Timing Discrepancy vulnerability in Drupal Token Content Access allows Brute Force. This issue affects Token Content Access versions: from 0.0.0 to 3.1.2.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18259"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-208"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T23:16:57Z",
    "severity": "HIGH"
  },
  "details": "Observable Timing Discrepancy vulnerability in Drupal Token Content Access allows Brute Force. This issue affects Token Content Access versions: from 0.0.0 to 3.1.2.",
  "id": "GHSA-prxm-c7p3-5gv7",
  "modified": "2026-08-26T21:31:40Z",
  "published": "2026-08-26T00:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18259"
    },
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2026-090"
    }
  ],
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  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.
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

CVE-2026-18259 (GCVE-0-2026-18259)

drupal-contrib-2026-090

Vulnerability from drupal

FKIE_CVE-2026-18259

GHSA-PRXM-C7P3-5GV7

Tags

Sightings

Nomenclature

Related by attack behaviour