{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:trychroma:chromadb:*:*:*:*:*:python:*:*",
            "extracted_events": [
              {
                "introduced": "0.5.0"
              },
              {
                "last_affected": "1.5.9"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "26b8ac67628e7b87ce53f067c0e95986378ccbaa"
            },
            {
              "last_affected": "a0a3c35217f2252870331dfd7b91590131fdad10"
            }
          ],
          "repo": "https://github.com/chroma-core/chroma",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "HiddenLayer",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45831.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "0.5.0"
          },
          {
            "last_affected": "*"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "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.",
  "id": "CVE-2026-45831",
  "modified": "2026-07-18T03:42:07.543958028Z",
  "published": "2026-06-12T15:03:58.841Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45831.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45831"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.hiddenlayer.com/sai-security-advisory/2026-06-chromadb-3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chroma-core/chroma"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ]
}