CVE-2026-45830
Description
A flaw was found in ChromaDB. A lack of authorization validation in the ChromaDB Python project allows any authenticated user to read, write, update, or delete data in any tenant's collection. This means an attacker can bypass intended access controls and manipulate data across different tenants, leading to unauthorized data access and modification.
Statement
This flaw is Post-authentication IDOR: ChromaDB resolves collections by UUID without tenant/database filtering, allowing any authenticated user who knows a collection UUID to access any tenant’s data. High severity for confidentiality and integrity; not Critical because authentication is required and there is no code execution or availability impact.
Mitigation
To reduce the attack surface, restrict network access to ChromaDB instances to only trusted clients and internal networks. Implement network segmentation and firewall rules to limit exposure of the ChromaDB service. This operational control helps prevent unauthorized access to the service, although it does not address the internal authorization bypass for already authenticated users.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.1 | 8.8 | 8.1 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | None | High | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
A user can access restricted functionality and/or sensitive information that may include administrative functionality and user accounts.
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