Security Digest · Vulnerability record
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.
CVSS 10.0 Critical EPSS 1.4% · p72
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.4%, percentile 72: FIRST’s model estimates a 1.4% chance of exploitation activity in the next 30 days, higher than 72% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
chromadb(PyPI) >= 1.0.0, <= 1.5.9, no fixed version listed. Check your lockfile, including transitive dependencies.
What it is
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.
From the GitHub advisory
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.
Weakness type: CWE-94, CWE-502.
Product: chromadb (PyPI) · Assigned by: HiddenLayer · Published: 2026-05-18
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | chromadb | >= 1.0.0, <= 1.5.9 | none listed |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Chroma | ChromaDB | 1.0.0 <= * |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| HiddenLayer | 4.0 | 10 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| redhat-SADP | 3.1 | 10 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 1.41% probability of exploitation activity in the next 30 days; percentile 72.
Timeline
- — CVE record published by HiddenLayer
- — GitHub-reviewed advisory GHSA-f4j7-r4q5-qw2c published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-f4j7-r4q5-qw2c github.com
- CVE.org record CVE-2026-45829 cve.org
- NVD entry CVE-2026-45829 nvd.nist.gov
Other references from the CVE record and advisory
- hiddenlayer.com hiddenlayer.com
- github.com github.com
- access.redhat.com access.redhat.com
- RHBZ#2479623 bugzilla.redhat.com
- security.access.redhat.com security.access.redhat.com
- github.com github.com
- github.com github.com
- pypi.org pypi.org