CVE-2026-45831 ChromaDB's SimpleRBACAuthorizationProvider doesn't check which tenant, database, or collection a permission applies to
Attackers can perform cross-tenant actions in ChromaDB because the authorization provider fails to verify tenant, database, or collection scope for permissions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45831?
CVE-2026-45831 is a high-severity missing authorization vulnerability in ChromaDB, published on 12 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-45831?
3 open source packages ship an affected version, including chromadb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
chromadb PyPI | From 0.5.0 to 1.5.9 | None |
chromadb PyPI | From 0.5.0 to 1.5.9 | None |
chromadb PyPI | From 0.5.0 to 1.5.9 | None |
Products include Trychroma Chromadb.
How do I fix CVE-2026-45831?
No fix has been published for CVE-2026-45831 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-45831 being exploited?
There is no known exploitation of CVE-2026-45831 in the wild and no public exploit code.
Other vulnerabilities in ChromaDB
Sources
Also known as GHSA-xph7-9rjv-w5fr, PYSEC-2026-3815.