CVE-2026-45829: ChromaDB Python project has a pre-authentication code injection vulnerability
A pre-authentication, code injection vulnerability in version 1.0.0 or later of the ChromaDB Python project allows an unauthenticated attacker to run arbitrary code on the server by sending a malicious model repository and trustremotecode set to true in the /api/v2/tenants/{tenant}/databases/{db}/collections endpoint.
Published May 18, 2026 · Updated Oct 5, 2026
Affected packages
chromadb
- Ecosystem
- PyPI
- Affected
- >= 1.0.0, <= 1.5.9
- Fixed in
- No patched version yet
- Check
pip show chromadb
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
A pre-authentication, code injection vulnerability in version 1.0.0 or later of the ChromaDB Python project allows an unauthenticated attacker to run arbitrary code on the server by sending a malicious model repository and trust_remote_code set to true in the /api/v2/tenants/{tenant}/databases/{db}/collections endpoint.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-45829
- https://github.com/chroma-core/chroma/issues/6717
- https://www.hiddenlayer.com/research/chromatoast-served-pre-auth
- https://access.redhat.com/security/cve/CVE-2026-45829
- https://bugzilla.redhat.com/show_bug.cgi?id=2479623
- https://github.com/advisories/GHSA-f4j7-r4q5-qw2c
- https://github.com/chroma-core/chroma
- https://github.com/pypa/advisory-database/tree/main/vulns/chromadb/PYSEC-2026-311.yaml
- https://pypi.org/project/chromadb
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology