CVE-2026-63178 (GCVE-0-2026-63178)
Vulnerability from cvelistv5 – Published: 2026-08-17 21:30 – Updated: 2026-08-17 21:30
VLAI
EPSS
VEX
Title
Onyx Curator-scope IDOR: any curator can modify membership of arbitrary user groups via unscoped PATCH /manage/admin/user-group/{id} and /add-users leading to cross-group document disclosure
Summary
Onyx is an open-source AI platform. Prior to 4.3.0, Onyx Enterprise Edition's PATCH /manage/admin/user-group/{user_group_id} and POST /manage/admin/user-group/{user_group_id}/add-users endpoints in ee/onyx/server/user_group/api.py call update_user_group and add_users_to_user_group in ee/onyx/db/user_group.py without enforcing _validate_curator_can_modify_group, allowing a curator to add accounts to arbitrary groups and obtain document access through get_acl_for_user and the OpenSearch access_control_list filter. This issue is fixed in version 4.3.0.
Severity
6.5 (Medium)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/onyx-dot-app/onyx/security/adv… | x_refsource_CONFIRM |
| https://github.com/onyx-dot-app/onyx/pull/12525 | x_refsource_MISC |
| https://github.com/onyx-dot-app/onyx/pull/12549 | x_refsource_MISC |
| https://github.com/onyx-dot-app/onyx/commit/46e19… | x_refsource_MISC |
| https://github.com/onyx-dot-app/onyx/commit/b9e1c… | x_refsource_MISC |
| https://github.com/onyx-dot-app/onyx/releases/tag… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| onyx-dot-app | onyx |
Affected:
< 4.3.0
|
guessed |
{
"containers": {
"cna": {
"affected": [
{
"product": "onyx",
"vendor": "onyx-dot-app",
"versions": [
{
"status": "affected",
"version": "\u003c 4.3.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Onyx is an open-source AI platform. Prior to 4.3.0, Onyx Enterprise Edition\u0027s PATCH /manage/admin/user-group/{user_group_id} and POST /manage/admin/user-group/{user_group_id}/add-users endpoints in ee/onyx/server/user_group/api.py call update_user_group and add_users_to_user_group in ee/onyx/db/user_group.py without enforcing _validate_curator_can_modify_group, allowing a curator to add accounts to arbitrary groups and obtain document access through get_acl_for_user and the OpenSearch access_control_list filter. This issue is fixed in version 4.3.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "CWE-639: Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T21:30:40.463Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m"
},
{
"name": "https://github.com/onyx-dot-app/onyx/pull/12525",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/onyx-dot-app/onyx/pull/12525"
},
{
"name": "https://github.com/onyx-dot-app/onyx/pull/12549",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/onyx-dot-app/onyx/pull/12549"
},
{
"name": "https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099"
},
{
"name": "https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664"
},
{
"name": "https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0"
}
],
"source": {
"advisory": "GHSA-7f48-vgpj-h95m",
"discovery": "UNKNOWN"
},
"title": "Onyx Curator-scope IDOR: any curator can modify membership of arbitrary user groups via unscoped PATCH /manage/admin/user-group/{id} and /add-users leading to cross-group document disclosure"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-63178",
"datePublished": "2026-08-17T21:30:40.463Z",
"dateReserved": "2026-07-15T22:13:00.720Z",
"dateUpdated": "2026-08-17T21:30:40.463Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-63178\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-17T22:17:16.130\",\"lastModified\":\"2026-08-17T22:17:16.130\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Onyx is an open-source AI platform. Prior to 4.3.0, Onyx Enterprise Edition\u0027s PATCH /manage/admin/user-group/{user_group_id} and POST /manage/admin/user-group/{user_group_id}/add-users endpoints in ee/onyx/server/user_group/api.py call update_user_group and add_users_to_user_group in ee/onyx/db/user_group.py without enforcing _validate_curator_can_modify_group, allowing a curator to add accounts to arbitrary groups and obtain document access through get_acl_for_user and the OpenSearch access_control_list filter. This issue is fixed in version 4.3.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"onyx-dot-app\",\"product\":\"onyx\",\"versions\":[{\"version\":\"\u003c 4.3.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.2,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-639\"}]}],\"references\":[{\"url\":\"https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/onyx-dot-app/onyx/pull/12525\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/onyx-dot-app/onyx/pull/12549\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m\",\"source\":\"security-advisories@github.com\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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