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.
3340 vulnerabilities reference this CWE, most recent first.
CVE-2026-54016 (GCVE-0-2026-54016)
Vulnerability from cvelistv5 – Published: 2026-06-23 16:43 – Updated: 2026-06-23 17:39- CWE-639 - Authorization Bypass Through User-Controlled Key
| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.9.6
|
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CVE-2026-54015 (GCVE-0-2026-54015)
Vulnerability from cvelistv5 – Published: 2026-06-23 16:44 – Updated: 2026-06-24 14:20| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.9.6
|
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CVE-2026-54010 (GCVE-0-2026-54010)
Vulnerability from cvelistv5 – Published: 2026-06-23 16:48 – Updated: 2026-06-24 03:56| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.9.6
|
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CVE-2026-54009 (GCVE-0-2026-54009)
Vulnerability from cvelistv5 – Published: 2026-06-23 16:49 – Updated: 2026-06-24 14:22- CWE-639 - Authorization Bypass Through User-Controlled Key
| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.9.6
|
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CVE-2026-54006 (GCVE-0-2026-54006)
Vulnerability from cvelistv5 – Published: 2026-06-23 16:50 – Updated: 2026-06-23 17:52- CWE-639 - Authorization Bypass Through User-Controlled Key
| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.9.6
|
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CVE-2026-53911 (GCVE-0-2026-53911)
Vulnerability from cvelistv5 – Published: 2026-06-11 09:41 – Updated: 2026-06-11 12:43- CWE-639 - Authorization Bypass Through User-Controlled Key
| URL | Tags |
|---|---|
| https://github.com/cerebrate-project/cerebrate/co… | patch |
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CVE-2026-53903 (GCVE-0-2026-53903)
Vulnerability from cvelistv5 – Published: 2026-07-01 11:58 – Updated: 2026-07-01 13:42- CWE-639 - Authorization Bypass Through User-Controlled Key
| URL | Tags |
|---|---|
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| https://mco.mycomplianceoffice.com/ | product |
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|---|---|---|---|
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25.3.3.1
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CVE-2026-53863 (GCVE-0-2026-53863)
Vulnerability from cvelistv5 – Published: 2026-06-16 18:05 – Updated: 2026-06-16 18:55 X_Open Source- CWE-639 - Authorization Bypass Through User-Controlled Key
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CVE-2026-53729 (GCVE-0-2026-53729)
Vulnerability from cvelistv5 – Published: 2026-07-07 20:23 – Updated: 2026-07-08 14:49- CWE-639 - Authorization Bypass Through User-Controlled Key
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CVE-2026-53726 (GCVE-0-2026-53726)
Vulnerability from cvelistv5 – Published: 2026-06-12 18:37 – Updated: 2026-06-12 18:57- CWE-639 - Authorization Bypass Through User-Controlled Key
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| parse-community | parse-server |
Affected:
< 8.6.80
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"dateUpdated": "2026-06-12T18:57:06.731Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "parse-server",
"vendor": "parse-community",
"versions": [
{
"status": "affected",
"version": "\u003c 8.6.80"
},
{
"status": "affected",
"version": "\u003e= 9.0.0, \u003c 9.9.1-alpha.6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.80 and 9.9.1-alpha.6, a relation query using the $relatedTo operator could read the membership of a Relation field even when that field was hidden from the requesting client by protectedFields, and even when the object owning the relation was not readable by the client under its ACL or class-level permissions. The request requires only the public API credentials that Parse clients normally carry \u2014 no user session, master key, or Cloud Code is needed. As a result, an unauthenticated client who knows or obtains the owning object\u0027s objectId could enumerate the objects linked through a protected relation, or combine the operator with an objectId constraint to use it as a membership oracle \u2014 confirming whether a specific object is linked to a private parent. This affects applications that rely on protectedFields or object ACLs to keep Relation membership confidential, such as private group memberships, block lists, or account-to-resource associations. This issue has been patched in versions 8.6.80 and 9.9.1-alpha.6."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "CWE-639: Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-12T18:37:01.695Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/parse-community/parse-server/security/advisories/GHSA-wmwx-jr2p-4j4r",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-wmwx-jr2p-4j4r"
},
{
"name": "https://github.com/parse-community/parse-server/pull/10493",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/parse-community/parse-server/pull/10493"
},
{
"name": "https://github.com/parse-community/parse-server/pull/10494",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/parse-community/parse-server/pull/10494"
}
],
"source": {
"advisory": "GHSA-wmwx-jr2p-4j4r",
"discovery": "UNKNOWN"
},
"title": "Parse Server: Relation `$relatedTo` query bypasses `protectedFields` and owning-object ACL"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53726",
"datePublished": "2026-06-12T18:37:01.695Z",
"dateReserved": "2026-06-10T16:43:31.242Z",
"dateUpdated": "2026-06-12T18:57:06.731Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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.