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.
3907 vulnerabilities reference this CWE, most recent first.
CVE-2026-82290 (GCVE-0-2026-82290)
Vulnerability from cvelistv5 – Published: 2026-08-28 16:19 – Updated: 2026-08-28 16:19
VLAI
EPSS
VEX
Title
Chainlit Feedback Endpoints Missing Ownership Validation
Summary
Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation.
Severity
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Chainlit/chainlit/issues/2975 | issue-tracking |
| https://github.com/Chainlit/chainlit | product |
| https://github.com/Chainlit/chainlit/blob/190ea74… | technical-description |
| https://www.vulncheck.com/advisories/chainlit-fee… | third-party-advisory |
Impacted products
Date Public
2026-07-03 00:00
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CVE-2026-82284 (GCVE-0-2026-82284)
Vulnerability from cvelistv5 – Published: 2026-08-28 16:19 – Updated: 2026-08-28 20:23
VLAI
EPSS
VEX
Title
Quivr Chat Endpoints Missing Ownership Validation
Summary
Quivr versions through 0.0.322 fail to validate chat ownership in the GET /chat/{chat_id}/history, DELETE /chat/{chat_id}, and POST /chat/{chat_id}/question/answer endpoints. Authenticated attackers can read other users' conversation histories including private knowledge base content, delete arbitrary chats, and inject fabricated messages into other users' conversations.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 20:23 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/QuivrHQ/quivr/issues/3697 | issue-tracking |
| https://github.com/QuivrHQ/quivr | product |
| https://github.com/QuivrHQ/quivr/blob/v0.0.322/ba… | technical-description |
| https://www.vulncheck.com/advisories/quivr-chat-e… | third-party-advisory |
Impacted products
Date Public
2026-07-03 00:00
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CVE-2026-82283 (GCVE-0-2026-82283)
Vulnerability from cvelistv5 – Published: 2026-08-28 16:19 – Updated: 2026-08-28 20:27
VLAI
EPSS
VEX
Title
VoltAgent Memory API Handlers Missing Ownership Checks
Summary
VoltAgent through 2.1.20 fails to validate conversation ownership in memory API handlers, allowing authenticated users to access other users' conversations. Attackers can read, modify, and delete arbitrary conversations and messages by supplying caller-controlled identifiers to memory endpoints.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 20:26 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/VoltAgent/voltagent/issues/1371 | issue-tracking |
| https://github.com/VoltAgent/voltagent | product |
| https://github.com/VoltAgent/voltagent/blob/44b4c… | technical-description |
| https://www.vulncheck.com/advisories/voltagent-me… | third-party-advisory |
Impacted products
Date Public
2026-07-03 00:00
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CVE-2026-82281 (GCVE-0-2026-82281)
Vulnerability from cvelistv5 – Published: 2026-08-28 16:19 – Updated: 2026-08-28 16:19
VLAI
EPSS
VEX
Title
Kotaemon Missing Ownership Check in Conversation Functions
Summary
Kotaemon through 0.12.0 fails to properly validate conversation ownership in select_conv, delete_conv, rename_conv, and on_set_public_conversation functions in control.py. Attackers can read other users' chat histories, delete conversations, or rename conversations by supplying arbitrary conversation identifiers without proper authorization checks.
Severity
7.4 (High)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Cinnamon/kotaemon/issues/846 | issue-tracking |
| https://github.com/Cinnamon/kotaemon | product |
| https://github.com/Cinnamon/kotaemon/blob/9ad3e4e… | technical-description |
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Impacted products
Date Public
2026-07-03 00:00
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CVE-2026-82280 (GCVE-0-2026-82280)
Vulnerability from cvelistv5 – Published: 2026-08-28 16:19 – Updated: 2026-08-28 16:19
VLAI
EPSS
VEX
Title
Quivr Prompt Endpoints Missing Ownership Validation
Summary
Quivr through 0.0.322 fails to validate ownership in prompt endpoints, allowing authenticated users to modify any prompt by identifier. Attackers with read-only access to shared brains can read exposed prompt identifiers and overwrite system prompts affecting all brain users.
Severity
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/QuivrHQ/quivr/issues/3698 | issue-tracking |
| https://github.com/QuivrHQ/quivr | product |
| https://github.com/QuivrHQ/quivr/blob/v0.0.322/ba… | technical-description |
| https://www.vulncheck.com/advisories/quivr-prompt… | third-party-advisory |
Impacted products
Date Public
2026-07-03 00:00
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CVE-2026-82271 (GCVE-0-2026-82271)
Vulnerability from cvelistv5 – Published: 2026-08-28 16:18 – Updated: 2026-08-28 16:18
VLAI
EPSS
VEX
Title
R2R Missing Ownership Check Allows Modifying Other Users' Conversations
Summary
R2R through 3.6.5 fails to properly validate user ownership in conversation update and message handlers, allowing authenticated users to modify other users' conversations. Attackers can supply arbitrary conversation identifiers to rename conversations and append messages to other users' conversation histories, corrupting state and injecting malicious content.
Severity
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/SciPhi-AI/R2R/issues/2292 | issue-tracking |
| https://github.com/SciPhi-AI/R2R | product |
| https://github.com/SciPhi-AI/R2R/blob/9c5a94d151f… | technical-description |
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Date Public
2026-06-02 00:00
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CVE-2026-81817 (GCVE-0-2026-81817)
Vulnerability from cvelistv5 – Published: 2026-08-27 13:10 – Updated: 2026-08-27 19:44
VLAI
EPSS
VEX
Title
Flowintel Missing Task-to-Case Authorization Allows Cross-Case Task Modification
Summary
Affected versions of Flowintel contain an insecure direct object reference / broken object-level authorization issue across numerous task endpoints.
The routes generally received both a case identifier and a task identifier, but previously they did not enforce that the task actually belonged to the supplied case. As a result, an authenticated user with editor-level access to one case could potentially substitute the ID of a task from another case and invoke operations against that foreign task.
The patch introduces task_case_bound_required, which loads both objects and returns 404 unless the task belongs to the requested case. This protection is applied to edit, delete, note, assignment, status, file, export, MISP-linking, subtask, external-reference, and other task-related endpoints.
The fix also adds explicit checks that a requested note_id belongs to the current task before returning or exporting it, closing related cross-object access paths.
Version impacted =>3.3.0
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 19:44 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/flowintel/flowintel/commit/106… | patch |
Impacted products
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CVE-2026-81668 (GCVE-0-2026-81668)
Vulnerability from cvelistv5 – Published: 2026-08-27 11:15 – Updated: 2026-08-27 14:30
VLAI
EPSS
VEX
Title
Rubygem-katello: cross-tenant content view filter rule access and modification via unauthorized parent filter lookup
Summary
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Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 14:27 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-81668 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2524928 | issue-trackingx_refsource_REDHAT |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6
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Date Public
2026-08-27 00:00
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CVE-2026-81658 (GCVE-0-2026-81658)
Vulnerability from cvelistv5 – Published: 2026-08-27 10:22 – Updated: 2026-08-27 14:47
VLAI
EPSS
VEX
Title
Foreman: cross-tenant disclosure of template revisions via unauthorized audit lookup
Summary
A flaw was found in Foreman. The template revision endpoint does not enforce object-level authorization when retrieving an audited template revision. An authenticated, low privileged user with a template-related permission, such as view_ptables, can obtain historical template contents belonging to another organization or location by supplying the corresponding audit ID. This can result in unauthorized disclosure of historical template contents, which may contain sensitive configuration information, credentials, or other secrets. The REST API revision endpoints correctly restrict this lookup.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 14:47 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-81658 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2524899 | issue-trackingx_refsource_REDHAT |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6
|
Date Public
2026-08-27 00:00
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CVE-2026-81576 (GCVE-0-2026-81576)
Vulnerability from cvelistv5 – Published: 2026-08-27 07:14 – Updated: 2026-08-27 13:13
VLAI
EPSS
VEX
Title
Improper Authentication of Session Handles
Summary
If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak
SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read
license information belonging to another handle.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 13:10 UTC
CWE
- CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cdn.wibu.com/fileadmin/wibu_downloads/sec… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wibu-systems-ag | codemeter-runtime |
Affected:
9.00 , < 9.10
(custom)
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Date Public
2026-08-25 13:00
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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.