Common Weakness Enumeration

CWE-639

Allowed

Authorization Bypass Through User-Controlled Key

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

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.

5223 vulnerabilities reference this CWE, most recent first.

CVE-2026-102139 (GCVE-0-2026-102139)

Vulnerability from cvelistv5 – Published: 2026-09-30 20:11 – Updated: 2026-10-01 13:37
VLAI
Title
Kiteworks Email Protection Gateway Incorrect Authorization
Summary
An authorization check in the large file exchange feature of Kiteworks Email Protection Gateway did not correctly establish that the requesting user was a party to the package being requested. An authenticated user of that optional feature could read the subject, message body, and attachments of packages they neither sent nor received.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 13:26 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-863 - Incorrect Authorization
Assigner
cisa-cg CNA under the CISA root
CNA scorecard B 76/100 over 127 records in the last 180 days details
References
Impacted products
Vendor Product Version
Kiteworks Email Protection Gateway Affected: 0 , < 9.5.1 (custom)
Unaffected: 9.5.1
Create a notification for this product.
Date Public
2026-09-30 00:00
Show details on NVD website
To clipboard 

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CVE-2026-102107 (GCVE-0-2026-102107)

Vulnerability from cvelistv5 – Published: 2026-09-30 20:24 – Updated: 2026-10-01 13:37
VLAI
Title
Kiteworks Core user impersonation in a file-request feature
Summary
Kiteworks Core contains a business logic flaw in a Kiteworks file-request feature allowed an authenticated user to send a request that appeared to originate from another user, because the server did not verify that the requester was authorized to act as the specified account. This could be used to solicit files or information from a recipient under a trusted identity; exploitation requires the feature to be enabled for the attacker's profile and the targeted recipient to act on the request.
Severity
4.6 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 13:14 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
cisa-cg CNA under the CISA root
CNA scorecard B 76/100 over 127 records in the last 180 days details
References
Impacted products
Vendor Product Version
Kiteworks Core Affected: 0 , < 9.5.1 (custom)
Unaffected: 9.5.1
Create a notification for this product.
Date Public
2026-09-30 00:00
Credits
Supr4s, https://yeswehack.com/hunters/supr4s Icare, https://yeswehack.com/hunters/icare
Show details on NVD website
To clipboard 

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CVE-2026-101112 (GCVE-0-2026-101112)

Vulnerability from cvelistv5 – Published: 2026-09-29 17:00 – Updated: 2026-09-30 16:05
VLAI
Title
Joomla Extension - balbooa.com - Unauthorized Deletion of Attachments in Balbooa Forms < 2.4.3.4
Summary
Joomla Extension - balbooa.com - Unauthorized Deletion of Attachments in Balbooa Forms < 2.4.3.4 - The public removeTmpAttachment action accepts an integer attachment ID and deletes the matching database row and file. The controller verifies a Joomla session token, but the model does not bind that ID to the session that uploaded the file, the current user, the form, the upload field, or the temporary state. Any guest can obtain a token for their own session, so the token prevents CSRF but does not authorize the target object.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 15:06 UTC
CWE
  • CWE-639 - (Authorization Bypass Through User-Controlled Key)
Assigner
Joomla CNA under the mitre root
CNA scorecard C 73/100 over 342 records in the last 180 days details
References
URL Tags
https://www.balbooa.com/ product
Impacted products
Credits
Sergiy Tryzhychynskyi
Show details on NVD website
To clipboard 

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CVE-2026-101084 (GCVE-0-2026-101084)

Vulnerability from cvelistv5 – Published: 2026-09-27 20:49 – Updated: 2026-09-30 22:12
VLAI
Title
obot before v0.21.1 Authorization Bypass via /mcp-connect
Summary
obot versions before v0.21.1 fail to enforce Access Control Rules on the /mcp-connect endpoint, allowing any authenticated user to connect to restricted MCP servers if they possess the server ID. Attackers can bypass authorization checks to access and manipulate sensitive backend systems through MCP tool calls using stored OAuth credentials.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
9.6 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 22:12 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6614 records in the last 180 days details
References
Impacted products
Vendor Product Version
obot-platform obot Affected: 0 , < 0.21.1 (semver)
Unaffected: 0.21.1 (semver)
Create a notification for this product.
Date Public
2026-05-08 00:00
Show details on NVD website
To clipboard 

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CVE-2026-101033 (GCVE-0-2026-101033)

Vulnerability from cvelistv5 – Published: 2026-09-27 13:16 – Updated: 2026-09-30 16:59
VLAI
Title
KitchenOwl through 0.7.10 IDOR via unchecked category ID
Summary
KitchenOwl through 0.7.10 fails to verify that category IDs belong to the caller's household in expense and item operations. Authenticated attackers can enumerate category IDs from other households to read their category names, budgets, and colors, breaking household isolation.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 16:59 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6614 records in the last 180 days details
References
Impacted products
Vendor Product Version
TomBursch kitchenowl Affected: 0 , ≤ 0.7.10 (semver)
Create a notification for this product.
Date Public
2026-09-16 00:00
Credits
George Chen
Show details on NVD website
To clipboard 

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CVE-2026-100897 (GCVE-0-2026-100897)

Vulnerability from cvelistv5 – Published: 2026-09-28 01:45 – Updated: 2026-10-01 13:58
VLAI
Title
fuzui StudentInfo Password Change Endpoint moditypasswordstu authorization
Summary
A security vulnerability has been detected in fuzui StudentInfo up to fcc42a639ec7cef620651bfd0f07ebb660529e3f. The impacted element is an unknown function of the file /StudentInfo/StudentHandler/moditypasswordstu of the component Password Change Endpoint. Such manipulation of the argument sid/tid leads to authorization bypass. The attack can be executed remotely. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
5.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:C
5.5 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 13:58 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 82/100 over 3949 records in the last 180 days details
References
URL Tags
https://vuldb.com/vuln/410847 vdb-entrytechnical-description
https://vuldb.com/vuln/410847/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-100897 third-party-advisory
https://vuldb.com/submit/919090 third-party-advisory
Impacted products
Vendor Product Version
fuzui StudentInfo Affected: fcc42a639ec7cef620651bfd0f07ebb660529e3f
    cpe:2.3:a:fuzui:studentinfo:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
pusa1 (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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CVE-2026-100885 (GCVE-0-2026-100885)

Vulnerability from cvelistv5 – Published: 2026-09-27 22:45 – Updated: 2026-09-30 22:15 X_Open Source
VLAI
Title
Krayin laravel-crm admin-config-setup API Endpoint CanInstall.php authorization
Summary
A vulnerability was found in Krayin laravel-crm up to 2.2.4. This affects an unknown function of the file packages/Webkul/Installer/src/Http/Middleware/CanInstall.php of the component admin-config-setup API Endpoint. The manipulation results in authorization bypass. The attack may be launched remotely. The exploit has been made public and could be used. Upgrading to version 2.2.5 mitigates this issue. The patch is identified as 89f2916b6a46ff91bd1999ce38158fa0de8b9490. Upgrading the affected component is recommended.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
7.3 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 22:15 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 82/100 over 3949 records in the last 180 days details
References
Impacted products
Vendor Product Version
Krayin laravel-crm Affected: 2.2.0
Affected: 2.2.1
Affected: 2.2.2
Affected: 2.2.3
Affected: 2.2.4
Unaffected: 2.2.5
    cpe:2.3:a:krayin:laravel-crm:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
bl4dsc4n (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2026-100878 (GCVE-0-2026-100878)

Vulnerability from cvelistv5 – Published: 2026-09-27 20:30 – Updated: 2026-09-28 13:02
VLAI
Title
zhistaredu StarTraining authRole Endpoint SysUser.java SysUser.isAdmin authorization
Summary
A vulnerability was identified in zhistaredu StarTraining up to 3.8.1. Affected by this issue is the function SysUser.isAdmin of the file edu-common/src/main/java/com/edu/common/core/domain/entity/SysUser.java of the component authRole Endpoint. The manipulation of the argument userId/roleIds leads to authorization bypass. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C
6.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 13:01 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 82/100 over 3949 records in the last 180 days details
References
URL Tags
https://vuldb.com/vuln/410808 vdb-entrytechnical-description
https://vuldb.com/vuln/410808/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-100878 third-party-advisory
https://vuldb.com/submit/915510 third-party-advisory
https://github.com/ArrestX/startraining-advisorie… exploit
Impacted products
Vendor Product Version
zhistaredu StarTraining Affected: 3.8.0
Affected: 3.8.1
    cpe:2.3:a:zhistaredu:startraining:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
thmanhz (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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CVE-2026-100688 (GCVE-0-2026-100688)

Vulnerability from cvelistv5 – Published: 2026-09-26 13:23 – Updated: 2026-10-08 15:21
VLAI
Title
Budibase server before 3.45.0 Cross-Tenant Information Disclosure
Summary
Budibase server before 3.45.0 contains a cross-tenant information disclosure vulnerability in the GET /api/applications/:appId/appPackage endpoint that allows authenticated users to read another tenant's application metadata and source code. Attackers can supply a victim tenant's app id to retrieve sensitive application details including navigation structure, role names, internal screen URLs, JavaScript snippets, and user identifiers without authorization checks.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 16:37 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6614 records in the last 180 days details
References
Impacted products
Vendor Product Version
budibase server Affected: 0 , < 3.45.0 (semver)
Unaffected: 3.45.0 (semver)
Create a notification for this product.
Date Public
2026-09-10 00:00
Credits
Hasinohacker
Show details on NVD website
To clipboard 

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CVE-2026-100679 (GCVE-0-2026-100679)

Vulnerability from cvelistv5 – Published: 2026-09-26 13:23 – Updated: 2026-09-28 18:03
VLAI
Title
stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket
Summary
stoatchat before 0.15.5 fails to validate that MFA tickets belong to the authenticated user, allowing attackers to bypass MFA by using their own valid ticket with another user's session token. Attackers can obtain a ticket from their own account and use it with a victim's session token to disable TOTP, view recovery codes, or perform other sensitive operations without providing the victim's credentials.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 18:01 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6614 records in the last 180 days details
References
Impacted products
Vendor Product Version
stoatchat stoatchat Affected: 0 , < 0.15.5 (semver)
Unaffected: 0.15.5 (semver)
Create a notification for this product.
Date Public
2026-09-11 00:00
Show details on NVD website
To clipboard 

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            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-26T13:23:41.637Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-gwg6-q3c3-97cx)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/stoatchat/stoatchat/security/advisories/GHSA-gwg6-q3c3-97cx"
        },
        {
          "name": "VulnCheck Advisory: stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-mfa-bypass-via-cross-account-ticket"
        }
      ],
      "title": "stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-100679",
    "datePublished": "2026-09-26T13:23:41.637Z",
    "dateReserved": "2026-09-26T02:36:51.809Z",
    "dateUpdated": "2026-09-28T18:03:01.169Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
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.

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