Vulnerability-Lookup

(CVE-2026-118554)

Vulnerability from drupal – Published: 2026-10-28 17:37 – Updated: 2026-10-28 17:39 – Source website

Details

The module enables authentication via the OpenID Connect (oAuth2) protocol.

When a new user logs in via OpenID Connect, the module tries to link the user to an existing account with the same email address. Doing so it allows to take over any existing Drupal account (except user 1) that has not yet been linked to an OpenID Connect user.

This vulnerability is mitigated by the fact that the site must be configured to use a provider that doesn't verify the email address of the user.

Credits

Sanjeev Kumar (ksanjeev284) www.drupal.org/u/ksanjeev284

References

URL

Type

https://www.drupal.org/sa-contrib-2026-287

WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "affected_versions": "\u003c2.3.1"
      },
      "package": {
        "ecosystem": "Packagist:https://packages.drupal.org/8",
        "name": "drupal/oidc"
      },
      "ranges": [
        {
          "database_specific": {
            "constraint": "\u003c2.3.1"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": []
    }
  ],
  "aliases": [
    "CVE-2026-118554"
  ],
  "credits": [
    {
      "contact": [
        "https://www.drupal.org/u/ksanjeev284"
      ],
      "name": "Sanjeev Kumar (ksanjeev284)"
    }
  ],
  "details": "The module enables authentication via the OpenID Connect (oAuth2) protocol.\n\nWhen a new user logs in via OpenID Connect, the module tries to link the user to an existing account with the same email address. Doing so it allows to take over any existing Drupal account (except user 1) that has not yet been linked to an OpenID Connect user.\n\nThis vulnerability is mitigated by the fact that the site must be configured to use a provider that doesn\u0027t verify the email address of the user.",
  "id": "DRUPAL-CONTRIB-2026-287",
  "modified": "2026-10-28T17:39:07.000Z",
  "published": "2026-10-28T17:37:54.000Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2026-287"
    }
  ],
  "schema_version": "1.7.0"
}

CVE-2026-118554 (GCVE-0-2026-118554)

Vulnerability from cvelistv5 – Published: 2026-10-30 03:08 – Updated: 2026-10-30 03:08

Title

OpenID Connect Client - Moderately critical - Improper authentication - SA-CONTRIB-2026-287

Summary

Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect Client allows Authentication Bypass. This issue affects OpenID Connect Client versions: from 0.0.0 to 2.3.1.

Severity

No CVSS data available.

CWE

CWE-288 - Authentication Bypass Using an Alternate Path or Channel

Assigner

drupal CNA under the mitre root

CNA scorecard D 53/100 over 279 records in the last 180 days details

References

1 reference

URL	Tags
https://www.drupal.org/sa-contrib-2026-287

Impacted products

1 product

Vendor	Product	Version
Drupal	OpenID Connect Client	Affected: 0.0.0 , < 2.3.1 (semver)

Date Public

2026-10-28 17:37

Credits

Sanjeev Kumar (ksanjeev284) Matthijs Van Assche (matthijs) Swan Kalata (akalata) Greg Knaddison (greggles) Juraj Nemec (poker10)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://www.drupal.org/project/oidc",
          "product": "OpenID Connect Client",
          "repo": "https://git.drupalcode.org/project/oidc",
          "vendor": "Drupal",
          "versions": [
            {
              "lessThan": "2.3.1",
              "status": "affected",
              "version": "0.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Sanjeev Kumar (ksanjeev284)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Matthijs Van Assche (matthijs)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Swan Kalata (akalata)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Greg Knaddison (greggles)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Juraj Nemec (poker10)"
        }
      ],
      "datePublic": "2026-10-28T17:37:54.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect Client allows Authentication Bypass. This issue affects OpenID Connect Client versions: from 0.0.0 to 2.3.1."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-115",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-115 Authentication Bypass"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-288",
              "description": "CWE-288 Authentication Bypass Using an Alternate Path or Channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T03:08:38.343Z",
        "orgId": "2c85b837-eb8b-40ed-9d74-228c62987387",
        "shortName": "drupal"
      },
      "references": [
        {
          "url": "https://www.drupal.org/sa-contrib-2026-287"
        }
      ],
      "title": "OpenID Connect Client - Moderately critical - Improper authentication - SA-CONTRIB-2026-287"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2c85b837-eb8b-40ed-9d74-228c62987387",
    "assignerShortName": "drupal",
    "cveId": "CVE-2026-118554",
    "datePublished": "2026-10-30T03:08:38.343Z",
    "dateReserved": "2026-10-28T15:50:46.718Z",
    "dateUpdated": "2026-10-30T03:08:38.343Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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