CVE-2026-45830: Chromadb ChromaDB Allows Any Authenticated Users Vulnerability

HIGH
Advisory Identifier: GHSA-2wm9-hf6c-p5cr
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CVSS 8.8
CWE-266 CWE-639
Published
Advisory Summary

CVE-2026-45830 is a HIGH (CVSS 8.8) chromadb allows any authenticated users vulnerability (CWE-266: Incorrect Privilege Assignment) affecting Chromadb libraries in the PyPI ecosystem. The issue involves chromadb allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45830 at a Glance

CVE Identifier CVE-2026-45830
GHSA Identifier GHSA-2wm9-hf6c-p5cr
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-266: Incorrect Privilege Assignment
Affected Product Chromadb
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-45830

To remediate this vulnerability, upgrade all affected Chromadb dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

chromadb fixed: Latest secure release 
pip install chromadb>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show chromadb

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-45830, inspect your installed packages using pip:

pip show chromadb

Analyze the terminal output to locate any version of Chromadb in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show chromadb command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-266: Incorrect Privilege Assignment, where a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. In Chromadb, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A lack of authorization validation in version 0.4.17 or later of the ChromaDB Python project allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection regardless of which tenant they belong to.

CVE-2026-45830 Affected Chromadb Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
chromadb
pypi/chromadb
PyPI
≥ 0.4.17
≤ 1.5.9

References

NVD — CVE-2026-45830 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45830
Chromadb Source Repository REPOSITORY
https://github.com/chroma-core/chroma/issues/7588
Chromadb Source Repository REPOSITORY
https://github.com/chroma-core/chroma/pull/7602
Chromadb Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-45830
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2488408
Chromadb Source Repository REPOSITORY
https://github.com/chroma-core/chroma
Chromadb Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45830.json
Chromadb Security Information SECURITY
https://www.hiddenlayer.com/sai-security-advisory/2026-06-chromadb

Frequently Asked Questions

What is CVE-2026-45830?
CVE-2026-45830 is a security vulnerability in Chromadb involving ChromaDB allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection under CWE-266: Incorrect Privilege Assignment.
Which Chromadb versions are affected?
Affected versions include releases prior to current release patches across affected packages: chromadb.
What version fixes CVE-2026-45830?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is chromadb affected?
Yes, chromadb is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-45830?
CVE-2026-45830 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-45830?
CVE-2026-45830 is classified under CWE-266: Incorrect Privilege Assignment (A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.).
How can I check PyPI dependencies for CVE-2026-45830?
Run the dependency tree command: 'pip show chromadb'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2wm9-hf6c-p5cr",
  "modified" : "2026-08-24T19:57:41Z",
  "published" : "2026-06-12T18:31:56Z",
  "aliases" : [ "CVE-2026-45830" ],
  "summary" : "ChromaDB allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection",
  "details" : "A lack of authorization validation in version 0.4.17 or later of the ChromaDB Python project allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection regardless of which tenant they belong to.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "chromadb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.4.17"
      }, {
        "last_affected" : "1.5.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45830"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chroma-core/chroma/issues/7588"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chroma-core/chroma/pull/7602"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-45830"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2488408"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chroma-core/chroma"
  }, {
    "type" : "WEB",
    "url" : "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45830.json"
  }, {
    "type" : "WEB",
    "url" : "https://www.hiddenlayer.com/sai-security-advisory/2026-06-chromadb"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-266", "CWE-639" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-24T19:57:41Z",
    "nvd_published_at" : "2026-06-12T16:16:28Z"
  }
}