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.
5433 vulnerabilities reference this CWE, most recent first.
CVE-2026-18441 (GCVE-0-2026-18441)
Vulnerability from cvelistv5 – Published: 2026-09-17 23:27 – Updated: 2026-09-19 14:21- CWE-639 - Authorization Bypass Through User-Controlled Key
| Vendor | Product | Version | |
|---|---|---|---|
| latepoint | Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress |
Affected:
0 , ≤ 5.6.9
(semver)
|
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CVE-2026-18439 (GCVE-0-2026-18439)
Vulnerability from cvelistv5 – Published: 2026-09-22 07:41 – Updated: 2026-09-23 18:46- CWE-639 - Authorization Bypass Through User-Controlled Key
| Vendor | Product | Version | |
|---|---|---|---|
| themeum | Tutor LMS – eLearning and online course solution |
Affected:
0 , ≤ 4.0.7
(semver)
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CVE-2026-18423 (GCVE-0-2026-18423)
Vulnerability from cvelistv5 – Published: 2026-09-15 19:30 – Updated: 2026-09-15 19:43- CWE-639 - Authorization bypass through User-Controlled key
| URL | Tags |
|---|---|
| https://documentation.concretecms.org/developers/… | release-notes |
| Vendor | Product | Version | |
|---|---|---|---|
| Concrete CMS | Concrete CMS |
Affected:
9.0.0 , ≤ 9.5.2
(git)
|
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CVE-2026-18315 (GCVE-0-2026-18315)
Vulnerability from cvelistv5 – Published: 2026-08-19 18:27 – Updated: 2026-08-21 16:15- CWE-639 - Authorization Bypass Through User-Controlled Key
| Vendor | Product | Version | |
|---|---|---|---|
| themetechmount | TrueBooker – Appointment Booking and Scheduler System |
Affected:
0 , ≤ 1.2.6
(semver)
|
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CVE-2026-18275 (GCVE-0-2026-18275)
Vulnerability from cvelistv5 – Published: 2026-08-06 15:11 – Updated: 2026-08-06 15:46- CWE-639 - Authorization Bypass Through User-Controlled Key
| Vendor | Product | Version | |
|---|---|---|---|
| Scripta | eScriptorium |
Affected:
0 , ≤ 26.4.1
(semver)
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CVE-2026-18258 (GCVE-0-2026-18258)
Vulnerability from cvelistv5 – Published: 2026-08-06 15:11 – Updated: 2026-08-06 15:45- CWE-639 - Authorization Bypass Through User-Controlled Key
| Vendor | Product | Version | |
|---|---|---|---|
| Scripta | eScriptorium |
Affected:
0 , ≤ 26.4.1
(semver)
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CVE-2026-18121 (GCVE-0-2026-18121)
Vulnerability from cvelistv5 – Published: 2026-09-10 23:10 – Updated: 2026-09-11 14:33| URL | Tags |
|---|---|
| https://documentation.concretecms.org/developers/… | release-notes |
| Vendor | Product | Version | |
|---|---|---|---|
| Concrete CMS | Concrete CMS |
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5.0.0 , ≤ 9.5.2
(git)
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CVE-2026-18028 (GCVE-0-2026-18028)
Vulnerability from cvelistv5 – Published: 2026-07-28 10:39 – Updated: 2026-07-28 12:38- CWE-639 - Authorization bypass through User-Controlled key
| URL | Tags |
|---|---|
| https://pretix.eu/about/en/blog/20260728-release-… | vendor-advisory |
| Vendor | Product | Version | |
|---|---|---|---|
| pretix GmbH | pretix |
Affected:
0 , < 2026.4.6
(python)
Affected: 2026.5.0 , < 2026.5.4 (python) Affected: 2026.6.0 , < 2026.6.1 (q) |
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CVE-2026-17627 (GCVE-0-2026-17627)
Vulnerability from cvelistv5 – Published: 2026-09-04 16:30 – Updated: 2026-09-04 17:36- CWE-639 - Authorization Bypass Through User-Controlled Key
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7286294 | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | Langflow OSS |
Affected:
1.0.0 , ≤ 1.10.2
(semver)
cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:langflow_oss:1.10.2:*:*:*:*:*:*:* |
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CVE-2026-17570 (GCVE-0-2026-17570)
Vulnerability from cvelistv5 – Published: 2026-07-27 17:38 – Updated: 2026-07-27 18:33- CWE-639 - Authorization Bypass Through User-Controlled Key
| Vendor | Product | Version | |
|---|---|---|---|
| Devolutions | Server |
Affected:
0 , < 2026.1.24
(custom)
Affected: 2026.2.4.0 , < 2026.2.14 (custom) |
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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"value": "Improper access control in the PAM password history endpoints in Devolutions Server allows an authenticated low-privileged user to disclose plaintext credential secrets via crafted API requests.\u003cp\u003eThis issue affects :\u003c/p\u003e\u003cul\u003e\u003cli\u003eDevolutions Server 2026.2.4.0 through 2026.2.12.0\u003c/li\u003e\u003cli\u003eDevolutions Server 2026.1.23.0 and earlier\u003c/li\u003e\u003c/ul\u003e"
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"orgId": "bfee16bd-18e6-446c-9a65-f5b2e3d89c23",
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"references": [
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"url": "https://devolutions.net/security/advisories/DEVO-2026-0026/"
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"datePublished": "2026-07-27T17:38:05.237Z",
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Mitigation
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Mitigation
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
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.