# 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.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Jun 2026
- **Updated:** 12 Jun 2026
- **Also known as:** GHSA-xph7-9rjv-w5fr, PYSEC-2026-3815

## 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 (Incorrect Authorization)

## Which versions are affected by CVE-2026-45831?

3 open source packages ship an affected version, including chromadb. It affects 1 product.


| Package | Ecosystem | 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: 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.

## 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

- [CVE-2026-45833](https://insights.sbomify.com/CVE-2026-45833/): ChromaDB has a code injection vulnerability (critical 9.4)
- [CVE-2026-45830](https://insights.sbomify.com/CVE-2026-45830/): ChromaDB allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection (high 8.8)
- [CVE-2026-45832](https://insights.sbomify.com/CVE-2026-45832/): Auth bypass in ChromaDB (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45831 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-45831 in the wild and no public exploit code.

Affected packages and fixed versions:
- chromadb (PyPI): affected from 0.5.0 up to 1.5.9; no fix listed
- chromadb (PyPI): affected from 0.5.0 up to 1.5.9; no fix listed
- chromadb (PyPI): affected from 0.5.0 up to 1.5.9; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-45831/ (Markdown: https://insights.sbomify.com/CVE-2026-45831/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45831
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45831
- OSV: https://osv.dev/vulnerability/CVE-2026-45831

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-45831/
Summaries are generated and may contain mistakes; the official description above is the record.