CVE-2026-45831: Chromadb ChromaDB's SimpleRBACAuthorizationProvider Doesn't Check Which Vulnerability

HIGH
Advisory Identifier: GHSA-xph7-9rjv-w5fr
Share
CVSS 8.8
CWE-863
Published
Advisory Summary

CVE-2026-45831 is a HIGH (CVSS 8.8) chromadb's simplerbacauthorizationprovider doesn't check which vulnerability (CWE-863: Incorrect Authorization) affecting Chromadb libraries in the PyPI ecosystem. The issue involves chromadb's simplerbacauthorizationprovider doesn't check which tenant, database, or collection a permission applies to. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45831 at a Glance

CVE Identifier CVE-2026-45831
GHSA Identifier GHSA-xph7-9rjv-w5fr
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-863: Incorrect Authorization
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-2026-45831

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-2026-45831, 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. 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

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.

CVE-2026-45831 Affected Chromadb Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
chromadb
pypi/chromadb
PyPI
≥ 0.5.0
≤ 1.5.9

References

NVD — CVE-2026-45831 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45831
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 Source Repository REPOSITORY
https://github.com/chroma-core/chroma
Chromadb Security Information SECURITY
https://www.hiddenlayer.com/sai-security-advisory/2026-06-chromadb-3

Frequently Asked Questions

What is CVE-2026-45831?
CVE-2026-45831 is a security vulnerability in Chromadb involving ChromaDB's SimpleRBACAuthorizationProvider doesn't check which tenant, database, or collection a permission applies to under CWE-863: Incorrect Authorization.
Which Chromadb versions are affected?
Affected versions include releases prior to current release patches across affected packages: chromadb.
What version fixes CVE-2026-45831?
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-2026-45831?
CVE-2026-45831 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-2026-45831?
CVE-2026-45831 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check PyPI dependencies for CVE-2026-45831?
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-xph7-9rjv-w5fr",
  "modified" : "2026-08-24T20:00:42Z",
  "published" : "2026-06-12T18:31:56Z",
  "aliases" : [ "CVE-2026-45831" ],
  "summary" : "ChromaDB's SimpleRBACAuthorizationProvider doesn't check which tenant, database, or collection a permission applies to",
  "details" : "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.",
  "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" : "0.5.0"
      }, {
        "last_affected" : "1.5.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45831"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chroma-core/chroma/issues/7588"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chroma-core/chroma/pull/7602"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chroma-core/chroma"
  }, {
    "type" : "WEB",
    "url" : "https://www.hiddenlayer.com/sai-security-advisory/2026-06-chromadb-3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-24T20:00:42Z",
    "nvd_published_at" : "2026-06-12T16:16:28Z"
  }
}