CWE-653

Improper Isolation or Compartmentalization

The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions.

CVE-2026-4282 (GCVE-0-2026-4282)

Vulnerability from cvelistv5 – Published: 2026-04-02 12:44 – Updated: 2026-04-07 11:27
VLAI
Title
Keycloak: keycloak: privilege escalation via forged authorization codes due to singleuseobjectprovider isolation flaw
Summary
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:6475 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6476 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6477 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6478 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4282 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2448061 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2.15-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-18 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-18 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2.15     cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.11-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-14 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-14 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.11     cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Date Public
2026-04-02 12:30
Credits
Red Hat would like to thank chungkn (OneMount Group) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-4325 (GCVE-0-2026-4325)

Vulnerability from cvelistv5 – Published: 2026-04-02 12:44 – Updated: 2026-04-07 11:27
VLAI
Title
Keycloak: keycloak: replay of action tokens via improper handling of single-use entries
Summary
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an attacker to delete arbitrary single-use entries, which can enable the replay of consumed action tokens, such as password reset links. This could lead to unauthorized access or account compromise.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE
  • CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:6475 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6476 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6477 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6478 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4325 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2448351 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2.15-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-18 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-18 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2.15     cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.11-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-14 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-14 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.11     cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Date Public
2026-04-02 12:30
Credits
Red Hat would like to thank chungkn (OneMount Group) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-5599 (GCVE-0-2026-5599)

Vulnerability from cvelistv5 – Published: 2026-04-05 12:36 – Updated: 2026-04-06 14:33
VLAI
Title
API allows deletion of users of other instance
Summary
A user with API access and "manage users" permission in any venueless world is able to trigger deletion of user accounts in other worlds.
Severity
7.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:H/SI:H/SA:H
CWE
  • CWE-653 - Improper isolation or compartmentalization
Assigner
References
Impacted products
Vendor Product Version
pretix Venueless Affected: 0.0.0 , < 02b9cbe5 (custom)
Create a notification for this product.
Credits
Pratik Karan
Show details on NVD website
To clipboard 

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CVE-2026-5600 (GCVE-0-2026-5600)

Vulnerability from cvelistv5 – Published: 2026-04-08 12:24 – Updated: 2026-04-08 16:03
VLAI
Summary
A new API endpoint introduced in pretix 2025 that is supposed to return all check-in events of a specific event in fact returns all check-in events belonging to the respective organizer. This allows an API consumer to access information for all other events under the same organizer, even those they should not have access to. These records contain information on the time and result of every ticket scan as well as the ID of the matched ticket. Example: { "id": 123, "successful": true, "error_reason": null, "error_explanation": null, "position": 321, "datetime": "2020-08-23T09:00:00+02:00", "list": 456, "created": "2020-08-23T09:00:00+02:00", "auto_checked_in": false, "gate": null, "device": 1, "device_id": 1, "type": "entry" } An unauthorized user usually has no way to match these IDs (position) back to individual people.
Severity
5.5 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H
CWE
  • CWE-653 - Improper isolation or compartmentalization
Assigner
References
Impacted products
Vendor Product Version
pretix pretix Affected: 2025.10.0 , < 2026.1.2 (python)
Affected: 2026.2.0 , < 2026.2.1 (python)
Affected: 2026.3.0 , < 2026.3.1 (python)
Create a notification for this product.
Credits
Pratik Karan
Show details on NVD website
To clipboard 

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Mitigation

Phase: Architecture and Design

Description:

  • Break up privileges between different modules, objects, or entities. Minimize the interfaces between modules and require strong access control between them.

No CAPEC attack patterns related to this CWE.

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