CVE-2026-8828: CWE-639 Authorization bypass through User-Controlled key in Chroma ChromaDB
CVE-2026-8828 is a high-severity authorization bypass vulnerability in ChromaDB Rust project version 1.0.0. It allows any authenticated user to read, write, update, or delete data in any tenant's collection without proper authorization checks. This affects data isolation between tenants, potentially leading to unauthorized data manipulation across tenant boundaries.
AI Analysis
Technical Summary
The vulnerability in ChromaDB version 1.0.0 arises from a lack of authorization validation related to user-controlled keys, classified under CWE-639. Authenticated users can bypass tenant isolation controls and perform arbitrary data operations on collections belonging to other tenants. The CVSS 4.0 base score is 8.8, indicating high impact with network attack vector, low attack complexity, and requiring low privileges but partial user interaction. The vulnerability compromises confidentiality, integrity, and availability of tenant data.
Potential Impact
Any authenticated user can access and manipulate data belonging to other tenants, violating data confidentiality and integrity. This can lead to unauthorized data disclosure, modification, or deletion across tenant boundaries, severely impacting multi-tenant environments relying on ChromaDB for data isolation.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict access to authenticated users carefully and consider additional application-layer authorization controls to mitigate unauthorized cross-tenant access.
CVE-2026-8828: CWE-639 Authorization bypass through User-Controlled key in Chroma ChromaDB
Description
CVE-2026-8828 is a high-severity authorization bypass vulnerability in ChromaDB Rust project version 1.0.0. It allows any authenticated user to read, write, update, or delete data in any tenant's collection without proper authorization checks. This affects data isolation between tenants, potentially leading to unauthorized data manipulation across tenant boundaries.
CVSS v4.0
Score 8.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in ChromaDB version 1.0.0 arises from a lack of authorization validation related to user-controlled keys, classified under CWE-639. Authenticated users can bypass tenant isolation controls and perform arbitrary data operations on collections belonging to other tenants. The CVSS 4.0 base score is 8.8, indicating high impact with network attack vector, low attack complexity, and requiring low privileges but partial user interaction. The vulnerability compromises confidentiality, integrity, and availability of tenant data.
Potential Impact
Any authenticated user can access and manipulate data belonging to other tenants, violating data confidentiality and integrity. This can lead to unauthorized data disclosure, modification, or deletion across tenant boundaries, severely impacting multi-tenant environments relying on ChromaDB for data isolation.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict access to authenticated users carefully and consider additional application-layer authorization controls to mitigate unauthorized cross-tenant access.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- HiddenLayer
- Date Reserved
- 2026-05-18T13:23:36.281Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2c2839e617e2d83487dad6
Added to database: 6/12/2026, 3:39:37 PM
Last enriched: 6/12/2026, 3:54:18 PM
Last updated: 6/12/2026, 4:55:17 PM
Views: 3
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