Security Digest · Vulnerability record
CVE-2026-45833: ChromaDB has a code injection vulnerability
A code injection vulnerability in version 0.4.17 or later of the ChromaDB Python project allows an authenticated attacker to run arbitrary code on the server by sending a malicious model repository and trustremotecode set to true in the…
CVSS 9.4 Critical EPSS 0.6% · p49
Should you act?
Critical, preconditions apply
Severe if exploited, but exploitation needs conditions that may not apply to you. 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 0.6%, percentile 49: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 49% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes
chromadb(PyPI) >= 0.4.17, <= 1.5.9, no fixed version listed. Check your lockfile, including transitive dependencies.
What it is
A code injection vulnerability in version 0.4.17 or later of the ChromaDB Python project allows an authenticated attacker to run arbitrary code on the server by sending a malicious model repository and trustremotecode set to true in the /api/v2/tenants/defaulttenant/databases/defaultdatabase/collections/{collectionid} if they have the UPDATECOLLECTION permission.
From the GitHub advisory
A code injection vulnerability in version 0.4.17 or later of the ChromaDB Python project allows an authenticated attacker to run arbitrary code on the server by sending a malicious model repository and trustremotecode set to true in the /api/v2/tenants/defaulttenant/databases/defaultdatabase/collections/{collectionid} if they have the UPDATECOLLECTION permission.
Weakness type: CWE-94.
Product: chromadb (PyPI) · Assigned by: HiddenLayer · Published: 2026-06-12
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | chromadb | >= 0.4.17, <= 1.5.9 | none listed |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Chroma | ChromaDB | 0.4.17 <= * |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| HiddenLayer | 4.0 | 9.4 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| redhat-SADP | 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 4.0 | 9.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Attack requirements: none
- Privileges required: low (any account)
- 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 no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.63% probability of exploitation activity in the next 30 days; percentile 49.
Timeline
- — CVE record published by HiddenLayer
- — GitHub-reviewed advisory GHSA-36p7-vc44-83pf 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-36p7-vc44-83pf github.com
- CVE.org record CVE-2026-45833 cve.org
- NVD entry CVE-2026-45833 nvd.nist.gov
Other references from the CVE record and advisory
- hiddenlayer.com hiddenlayer.com
- access.redhat.com access.redhat.com
- RHBZ#2488430 bugzilla.redhat.com
- security.access.redhat.com security.access.redhat.com