Common Weakness Enumeration
CWE-639
AllowedAuthorization Bypass Through User-Controlled Key
Abstraction: Base · Status: Incomplete
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
2801 vulnerabilities reference this CWE, most recent first.
CVE-2026-56780 (GCVE-0-2026-56780)
Vulnerability from cvelistv5 – Published: 2026-06-29 17:14 – Updated: 2026-11-08 14:06 X_Open Source
VLAI
EPSS
VEX
Title
Modoboa < 2.9.0 - Insecure Direct Object Reference in Account Password Change API
Summary
Modoboa before 2.9.0 contains an insecure direct object reference vulnerability in the PUT /api/v1/accounts/{pk}/password/ endpoint that allows domain administrators to change any user's password. Attackers with domain admin privileges can bypass object-level access controls to reset superadmin passwords and achieve full account takeover.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 14:06 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/modoboa/modoboa/pull/4038 | issue-trackingpatch |
| https://github.com/modoboa/modoboa/commit/a1878c4… | patch |
| https://www.vulncheck.com/advisories/modoboa-inse… | third-party-advisory |
Impacted products
Date Public
2026-05-27 00:00
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CVE-2026-56774 (GCVE-0-2026-56774)
Vulnerability from cvelistv5 – Published: 2026-06-25 18:10 – Updated: 2026-11-08 14:06 X_Open Source
VLAI
EPSS
VEX
Title
Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID
Summary
Kanboard through 1.2.52, fixed in commit 928c68a, UserViewController::removeSession fails to validate the session id parameter before passing it to RememberMeSessionModel::remove, allowing authenticated users to delete other users' Remember Me sessions. Attackers can enumerate sequential session IDs and mass-invalidate persistent login sessions of any user, including administrators, forcing re-authentication and causing denial of service.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 20:28 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/kanboard/kanboard/issues/5829 | technical-descriptionexploitissue-tracking |
| https://github.com/kanboard/kanboard/pull/5831 | issue-trackingpatch |
| https://github.com/kanboard/kanboard/commit/928c6… | patch |
| https://www.vulncheck.com/advisories/kanboard-cro… | third-party-advisory |
Impacted products
Date Public
2026-06-04 00:00
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CVE-2026-56772 (GCVE-0-2026-56772)
Vulnerability from cvelistv5 – Published: 2026-06-25 18:08 – Updated: 2026-11-08 14:06 X_Open Source
VLAI
EPSS
VEX
Title
NewsBlur < 14.5.0 - Insecure Direct Object Reference in Social Interactions Endpoint
Summary
NewsBlur before 14.5.0 contains a broken access control vulnerability that allows authenticated users to read private notification feeds by supplying arbitrary user_id values to the GET /social/interactions endpoint without ownership verification. Attackers can enumerate user_id values to access another user's follows, replies, and social activity without authorization.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 18:29 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/samuelclay/NewsBlur/releases/t… | release-notes |
| https://github.com/samuelclay/NewsBlur/commit/613… | patch |
| https://www.vulncheck.com/advisories/newsblur-ins… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| samuelclay | NewsBlur |
Affected:
0 , < 14.5.0
(semver)
|
Date Public
2026-06-02 00:00
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CVE-2026-56765 (GCVE-0-2026-56765)
Vulnerability from cvelistv5 – Published: 2026-07-10 13:57 – Updated: 2026-07-10 17:00
VLAI
EPSS
VEX
Title
Vikunja - Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR
Summary
Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches attachments by sequential ID without verifying ownership, allowing attackers to download and delete all file attachments across all projects instance-wide.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 16:40 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/vikunja-unau… | third-party-advisory |
Impacted products
Date Public
2026-03-23 00:00
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CVE-2026-56728 (GCVE-0-2026-56728)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:10 – Updated: 2026-09-25 18:38
VLAI
EPSS
VEX
Title
Zammad: Cross-User Taskbar Item Access Control Vulnerability
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, a broken access control vulnerability exists in Zammad's GraphQL API. An authenticated user can access taskbar item data belonging to another user by crafting a request with the target user's taskbar identifier. The taskbar feature stores transient state for active user sessions, including auto-saved ticket drafts. Under certain conditions, the authorization check for taskbar item access is not enforced, allowing a user to read another user's taskbar item data. This vulnerability is fixed in 7.0.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:38 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/4ccd5d573… | x_refsource_MISC |
| https://github.com/zammad/zammad/releases/tag/7.0.2 | x_refsource_MISC |
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CVE-2026-56724 (GCVE-0-2026-56724)
Vulnerability from cvelistv5 – Published: 2026-09-25 16:46 – Updated: 2026-09-25 17:45
VLAI
EPSS
VEX
Title
Zammad: Incorrect implementation of permission checks in the knowledge base module
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, summary An issue with permission checks in the knowledge base management area has been identified. Under certain conditions, data validation for linked items was not fully enforced. This could have allowed users with limited read permissions to interact with items outside their assigned access scope. Data access has been strengthened in the current version through additional validation routines. This issue is fixed in version 7.0.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 17:44 UTC
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/13ccc136e… | x_refsource_MISC |
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CVE-2026-56721 (GCVE-0-2026-56721)
Vulnerability from cvelistv5 – Published: 2026-08-11 15:48 – Updated: 2026-11-08 14:06
VLAI
EPSS
VEX
Title
CamaleonCMS 2.9.2 Privilege Escalation via Parameter Confusion in UsersController
Summary
CamaleonCMS version 2.9.2 and earlier contains a privilege escalation vulnerability via insecure direct object reference (IDOR) that allows authenticated low-privileged attackers to overwrite any user's credentials by exploiting a parameter confusion flaw between the authorization filter and action body in the UsersController. Attackers can send a PATCH request to the updated_ajax endpoint setting params[:id] to their own user ID to pass the self-authorization check while simultaneously setting params[:user_id] to a victim's ID, causing the controller to load and mutate the victim's account, including overwriting administrator passwords to achieve full site takeover.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 17:44 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/owen2345/camaleon-cms | product |
| https://github.com/owen2345/camaleon-cms/pull/1185 | issue-trackingpatch |
| https://github.com/owen2345/camaleon-cms/commit/2… | patch |
| https://www.vulncheck.com/advisories/camaleoncms-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| owen2345 | CamaleonCMS |
Affected:
0 , ≤ 2.9.2
(semver)
cpe:2.3:a:tuzitio:camaleon_cms:*:*:*:*:*:*:*:* |
Date Public
2026-08-10 00:00
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CVE-2026-56424 (GCVE-0-2026-56424)
Vulnerability from cvelistv5 – Published: 2026-06-22 12:17 – Updated: 2026-06-23 14:19
VLAI
EPSS
VEX
Title
Broken access control in MISP core allows cross-organization unauthorized modification or deletion of analyst data, event reports, collections, templates, and decaying models
Summary
MISP core contained multiple broken access-control flaws where authorization checks were performed against the wrong entity, or where ownership/editability checks were missing on write paths. In affected subsystems, a lower-privileged authenticated user with the relevant feature permission could cause the application to authorize one object but mutate another, or could modify objects that were merely visible rather than editable by the user’s organization.
The affected paths included:
* Event Reports tag removal: the route-authorized report could differ from the report ID used for tag detachment, enabling cross-organization tag removal from another event report
* Collection Elements bulk deletion: bulk deletion authorized against a collection whose ID matched the collection-element row ID, rather than the element’s actual parent collection, enabling deletion of elements from collections the user did not own.
* Analyst Data capture/update: nested analyst data updates could overwrite an existing record without applying the normal canEditAnalystData ownership check, enabling cross-organization overwrite of analyst data records.
* Template Elements editing: editing authorized against a template whose ID matched the template-element ID, rather than the element’s actual parent template, enabling unauthorized edits to another organization’s template elements.
* Decaying Model editing and mappings: write paths loaded models using view-scope access but did not verify edit ownership, enabling users to edit or remap visible models owned by another organization.
Successful exploitation could allow an authenticated user with subsystem-specific permissions to perform unauthorized cross-organization modifications or deletions of MISP data, resulting in integrity loss, unauthorized tampering with shared intelligence, and disruption of analyst workflows.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 14:03 UTC
CWE
Assigner
CIRCL
CNA
References
5 references
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CVE-2026-56422 (GCVE-0-2026-56422)
Vulnerability from cvelistv5 – Published: 2026-06-22 11:43 – Updated: 2026-06-23 05:58
VLAI
EPSS
VEX
Title
MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields
Summary
Multiple MISP core controllers and model capture paths accepted client-controlled request fields such as primary keys (id) and ownership/scope foreign keys (event_id, org_id, user_id, sharing_group_id, galaxy_cluster_uuid, organisation_uuid, and related nested object identifiers) without consistently stripping, pinning, or revalidating them against the server-authorized object.
In affected paths, an authenticated user with access to one authorized object could submit crafted REST or form payloads that caused MISP to save data against a different object than the one checked by the authorization logic. Depending on the endpoint, this could allow object overwrite, object re-parenting, ownership transfer, unauthorized sharing-group scoping, event/object injection, proposal retargeting, or stored attacker-controlled content appearing in another user’s context.
The fixes harden affected create/edit/import flows by stripping client-supplied primary keys on create-only saves, re-pinning route- or database-authorized identifiers before save operations, validating effective sharing-group scope, and adding field whitelists where ownership fields must never be editable. The initial broad fix also added a central CRUDComponent::edit() primary-key re-pin so payload-supplied IDs cannot redirect saves away from the already-authorized row. GitHub’s patch for 7acf8220c describes this central issue as CRUDComponent::edit() copying supplied fields, including a payload primary key, onto the loaded record, allowing CakePHP save() to update an arbitrary row unless the loaded ID is re-pinned.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 16:09 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
CIRCL
CNA
References
16 references
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CVE-2026-56385 (GCVE-0-2026-56385)
Vulnerability from cvelistv5 – Published: 2026-06-21 13:27 – Updated: 2026-11-08 14:06
VLAI
EPSS
VEX
Title
Craft CMS - Authorization Bypass in assets/preview-file Endpoint
Summary
Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 12:18 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/craftcms/cms/security/advisori… | vendor-advisory |
| https://github.com/craftcms/cms/commit/d30df31122… | patch |
| https://www.vulncheck.com/advisories/craft-cms-au… | third-party-advisory |
Impacted products
Date Public
2026-03-24 00:00
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"metrics": [
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"lessThan": "5.9.14",
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"version": "5.0.0-RC1",
"versionType": "semver"
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"version": "4.0.0-RC1",
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"cpeApplicability": [
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"cveMetadata": {
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"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-56385",
"datePublished": "2026-06-21T13:27:01.066Z",
"dateReserved": "2026-06-21T02:05:47.495Z",
"dateUpdated": "2026-11-08T14:06:10.554Z",
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Mitigation
Architecture and Design
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Mitigation
Architecture and Design
Implementation
Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
Mitigation
Architecture and Design
Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
No CAPEC attack patterns related to this CWE.