CVE-2026-45831: CWE-863: Incorrect Authorization in Chroma ChromaDB
The SimpleRBACAuthorizationProvider authorization provider in versions 0.5.0 or later of the ChromaDB Python project evaluates whether a user holds a given permission but never checks which tenant, database, or collection that permission applies to allowing users to perform cross tenant actions.
AI Analysis
Technical Summary
The vulnerability in ChromaDB version 0.5.0 arises from the SimpleRBACAuthorizationProvider's failure to validate the scope of permissions. While it checks if a user has a given permission, it does not confirm whether that permission applies to the specific tenant, database, or collection involved. This incorrect authorization (CWE-863) enables users with limited permissions to perform actions across tenants, violating tenant isolation principles.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized cross-tenant access and actions within ChromaDB, potentially exposing or modifying data belonging to other tenants. This breaks tenant isolation and could result in data leakage or unauthorized data manipulation. The CVSS 4.0 base score is 8.8 (high), indicating a significant impact on confidentiality, integrity, and availability with low attack complexity and no user interaction required.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Users of ChromaDB version 0.5.0 should monitor the vendor's advisories for updates. Until a fix is released, consider restricting access to trusted users only and applying compensating controls to limit cross-tenant access where possible.
CVE-2026-45831: CWE-863: Incorrect Authorization in Chroma ChromaDB
Description
The SimpleRBACAuthorizationProvider authorization provider in versions 0.5.0 or later of the ChromaDB Python project evaluates whether a user holds a given permission but never checks which tenant, database, or collection that permission applies to allowing users to perform cross tenant actions.
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 0.5.0 arises from the SimpleRBACAuthorizationProvider's failure to validate the scope of permissions. While it checks if a user has a given permission, it does not confirm whether that permission applies to the specific tenant, database, or collection involved. This incorrect authorization (CWE-863) enables users with limited permissions to perform actions across tenants, violating tenant isolation principles.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized cross-tenant access and actions within ChromaDB, potentially exposing or modifying data belonging to other tenants. This breaks tenant isolation and could result in data leakage or unauthorized data manipulation. The CVSS 4.0 base score is 8.8 (high), indicating a significant impact on confidentiality, integrity, and availability with low attack complexity and no user interaction required.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Users of ChromaDB version 0.5.0 should monitor the vendor's advisories for updates. Until a fix is released, consider restricting access to trusted users only and applying compensating controls to limit cross-tenant access where possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- HiddenLayer
- Date Reserved
- 2026-05-13T14:01:39.604Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2c2836e617e2d83487d711
Added to database: 6/12/2026, 3:39:34 PM
Last enriched: 6/12/2026, 3:56:49 PM
Last updated: 6/12/2026, 8:21:43 PM
Views: 5
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