stigmem before 0.9.0a12 Cross-Tenant BOLA via quarantine

{
  "id": "fa0df023c00e1c863dfcac515052a2a8db029922abdbeba1c9cd7ee99c7f617b",
  "url": "https://osv.dev/vulnerability/CVE-2026-76237",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "stigmem before 0.9.0a12 Cross-Tenant BOLA via quarantine",
    "summary": "stigmem-node before 0.9.0a12 contains a broken object level authorization (cross-tenant BOLA) vulnerability in the quarantine review endpoints. On multi-tenant deployments running the opt-in stigmem-plugin-multi-tenant, the list/count queries and _get_quarantined_fact in routes/quarantine.py lacked a tenant_id predicate and the garden lookup was not tenant-scoped, allowing a tenant administrator with only a plain tenant write capability to list, read, and admit or reject quarantined facts belonging to other tenants via the /v1/quarantine endpoints. Default single-tenant deployments are not affected.",
    "evidence": "osv:CVE-2026-76237",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-76237",
      "aliases": [
        "CVE-2026-76237",
        "GHSA-xhv3-q4xx-349r"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eidetic-labs/stigmem",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "935751421d481fa05bf3d56adba590c2de95378c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.9.0a12"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.9.0a12"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9.0a11",
            "v0.9.0a10",
            "v0.9.0a9",
            "v0.9.0a8",
            "v0.9.0a7",
            "v0.9.0a6",
            "v0.9.0a5",
            "v0.9.0a4",
            "v0.9.0a3",
            "v0.9.0a2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76237.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.464302241Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76237.json",
        "https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-xhv3-q4xx-349r",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-76237",
        "https://www.vulncheck.com/advisories/stigmem-before-0a12-cross-tenant-bola-via-quarantine"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76237.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-76237",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493883,
  "published_at": "2026-08-19T14:02:15.899+00:00"
}