DRUPAL-CONTRIB-2026-242

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    DRUPAL-CONTRIB-2026-242

    Published: 21 Oct 2026Last Modified: 28 Oct 2026

    Summary:

    Details: This module introduces an OAuth 2.0 authorization server, which can be configured to protect your Drupal instance with access tokens, or allow clients to request new access tokens and refresh them. Since version 6.1.0, the module could cache a token's permissions in a way that let them be reused for another user's token with the same scopes. A user could gain permissions they do not have, including administrative access. This vulnerability is mitigated by the fact that an attacker needs an OAuth2 token, and cannot trigger the issue themselves: a more privileged user's token with the same scopes must be used first. User 1 is not affected unless security.enable\_super\_user is set to false.

    References: https://www.drupal.org/sa-contrib-2026-242

    Affected packages

    Package

    Name: drupal/simple_oauth

    Purl: pkg:composer/drupal/simple_oauth?repository_url=https:%2F%2Fpackages.drupal.org%2F8

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 6.1.0
    Fixed -6.1.3

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    DRUPAL-CONTRIB-2026-242 | CVE-DB