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.
5282 vulnerabilities reference this CWE, most recent first.
CVE-2026-73612 (GCVE-0-2026-73612)
Vulnerability from cvelistv5 – Published: 2026-08-13 11:28 – Updated: 2026-08-14 16:52
VLAI
EPSS
VEX
Title
File Browser before v2.63.22 Authorization Bypass via Recursive Operations
Summary
File Browser before v2.63.22 fails to validate access rules for descendants during recursive copy, rename, and delete operations, allowing authenticated users to bypass path-based access controls. Attackers can copy, rename, or delete denied files by operating on their allowed parent directory, defeating rule-based isolation for confidentiality and integrity.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:54 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/filebrowser/filebrowser/securi… | vendor-advisory |
| https://github.com/filebrowser/filebrowser/commit… | patch |
| https://www.vulncheck.com/advisories/file-browser… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| filebrowser | filebrowser |
Affected:
0 , < 2.63.22
(semver)
Unaffected: 2.63.22 (semver) cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* |
Date Public
2026-07-27 00:00
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CVE-2026-73610 (GCVE-0-2026-73610)
Vulnerability from cvelistv5 – Published: 2026-08-13 11:28 – Updated: 2026-08-14 16:52
VLAI
EPSS
VEX
Title
SiYuan before v3.7.4 Information Disclosure via Local Storage
Summary
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Severity
5.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:50 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-befor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.7.4
(semver)
Unaffected: 3.7.4 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-07-29 00:00
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CVE-2026-73606 (GCVE-0-2026-73606)
Vulnerability from cvelistv5 – Published: 2026-08-13 11:28 – Updated: 2026-08-14 16:52
VLAI
EPSS
VEX
Title
SiYuan before v3.7.4 Information Disclosure via getRefIDs
Summary
SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/block/getRefIDs endpoint that fails to check password-protected document tiers. Unauthenticated readers can discover that password-protected documents reference specific blocks and obtain block identifiers without entering the document password.
Severity
5.8 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:47 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-befor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.7.4
(semver)
Unaffected: 3.7.4 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-07-29 00:00
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CVE-2026-73488 (GCVE-0-2026-73488)
Vulnerability from cvelistv5 – Published: 2026-08-13 11:28 – Updated: 2026-08-13 14:51
VLAI
EPSS
VEX
Title
Flowise before 3.1.3 IDOR via customer-default-source endpoint
Summary
Flowise versions before 3.1.3 contain an insecure direct object reference vulnerability in the GET /api/v1/organization/customer-default-source endpoint that allows authenticated attackers to access other customers' payment and profile data by manipulating the customerId parameter. Attackers can enumerate predictable customer IDs to retrieve sensitive information including email addresses, account balances, currency types, and billing configurations without authorization checks.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:50 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FlowiseAI/Flowise/security/adv… | vendor-advisory |
| https://www.vulncheck.com/advisories/flowise-befo… | third-party-advisory |
Impacted products
Date Public
2026-07-27 00:00
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CVE-2026-73395 (GCVE-0-2026-73395)
Vulnerability from cvelistv5 – Published: 2026-08-18 14:00 – Updated: 2026-08-18 14:41
VLAI
EPSS
VEX
Title
WordPress Booking calendar, Appointment Booking System plugin <= 3.2.36 - Insecure Direct Object References (IDOR) vulnerability
Summary
Unauthenticated Insecure Direct Object References (IDOR) in Booking calendar, Appointment Booking System <= 3.2.36 versions.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 14:41 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wpdevart | Booking calendar, Appointment Booking System |
Affected:
n/a , ≤ 3.2.36
(custom)
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CVE-2026-73320 (GCVE-0-2026-73320)
Vulnerability from cvelistv5 – Published: 2026-09-08 13:19 – Updated: 2026-10-01 15:20
VLAI
EPSS
VEX
Title
XenForo < 2.3.13 Unauthenticated Information Disclosure via Unfurl Endpoint
Summary
XenForo before 2.3.13 contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private unfurl records by supplying predictable auto-increment primary key IDs to the unfurl endpoint. Attackers can enumerate or predict result IDs and query the endpoint without any session, user, or visibility checks to obtain rendered preview HTML, original URLs, and query strings from private conversations and other restricted content.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 13:40 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://xenforo.com/community/threads/security-fi… | vendor-advisorypatch |
| https://xenforo.com/community/threads/xenforo-2-3… | release-notes |
| https://bombobombone.github.io/posts/cve-2026-73320/ | technical-description |
| https://github.com/BomboBombone/CVE-2026-73320 | exploit |
| https://www.vulncheck.com/advisories/xenforo-unau… | third-party-advisory |
Impacted products
Date Public
2026-09-07 00:00
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CVE-2026-73303 (GCVE-0-2026-73303)
Vulnerability from cvelistv5 – Published: 2026-08-12 18:51 – Updated: 2026-08-12 22:11
VLAI
EPSS
VEX
Title
Budibase: Email Change IDOR via POST /api/v2/email allows full Account Takeover (accountId not validated against session)
Summary
Budibase is an open-source low-code platform. Prior to 3.40.0, POST /api/v2/email on account.budibase.app accepted a client-controlled accountId without binding it to the authenticated session, while checking only currentEmail. An authenticated attacker who obtains a victim account identifier can start the email-change workflow for the victim, receive and submit the verification code through POST /api/v2/email/verification, move the victim email to an attacker-controlled address, and complete a password reset as the victim. This issue is fixed in version 3.40.0.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:08 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Budibase/budibase/security/adv… | x_refsource_CONFIRM |
| https://github.com/Budibase/budibase/releases/tag… | x_refsource_MISC |
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CVE-2026-73298 (GCVE-0-2026-73298)
Vulnerability from cvelistv5 – Published: 2026-08-12 17:24 – Updated: 2026-08-12 22:11
VLAI
EPSS
VEX
Title
Microsoft Container Migration Solution Accelerator: Authenticated IDOR allowing read/write/delete processes
Summary
The Microsoft Container Migration Solution Accelerator is a multi-service application that provides a multi-agent, AI-driven migration solution for moving container service configurations to Azure Kubernetes Service. In version 2.1.2 and earlier, a security vulnerability was identified in the Container Migration Solution Accelerator, specifically an authenticated IDOR (Insecure Direct Object Reference) that allows users to read, write, and delete processes belonging to other authenticated users. The issue affects multiple API endpoints, where ownership checks are missing, enabling unauthorized access and modification of migration data across users within the same organization. The vulnerability is present in both process and file management APIs, and the application relies on Entra ID authentication but lacks proper authorization controls between users. Authenticated users are able to access, modify, and delete processes and files belonging to other users without proper authorization checks.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:09 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/microsoft/Container-Migration-… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| microsoft | Container-Migration-Solution-Accelerator |
Affected:
<= 2.1.2
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CVE-2026-73239 (GCVE-0-2026-73239)
Vulnerability from cvelistv5 – Published: 2026-08-12 16:41 – Updated: 2026-08-13 15:49
VLAI
EPSS
VEX
Title
Apache Allura: Missing permission checks IDOR
Summary
Insecure Direct Object Reference (IDOR) due to missing permission checks for multiple Artifact types in Apache Allura.
This issue affects Apache Allura: before 1.19.1.
Users are recommended to upgrade to version 1.19.1, which fixes the issue.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:49 UTC
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Allura |
Affected:
0 , < 1.19.1
(semver)
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CVE-2026-73189 (GCVE-0-2026-73189)
Vulnerability from cvelistv5 – Published: 2026-08-18 14:00 – Updated: 2026-08-25 15:38
VLAI
EPSS
VEX
This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. Duplicate to CVE-2026-14858
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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.