Auth bypass in Chroma Chromadb

CVE-2026-8828

A lack of authorization validation in version 1.0.0 or later of the ChromaDB Rust project allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection regardless of which tenant they belong to.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.003 (20.2th percentile) — read the EPSS interpretation.