Scriban before 7.0.0 MemberFilter Bypass via TemplateContext Cache

{
  "id": "425d19f5003d04cc93bd72281457c31e3f37ad468427c2b3551e84719aa7dd45",
  "url": "https://osv.dev/vulnerability/CVE-2026-74790",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Scriban before 7.0.0 MemberFilter Bypass via TemplateContext Cache",
    "summary": "Scriban before 7.0.0 caches TypedObjectAccessor by Type only without considering MemberFilter changes, allowing reused TemplateContext instances to expose members that should be hidden. Attackers can access filtered properties and fields by reusing a TemplateContext after tightening its MemberFilter, bypassing sandbox policies across requests or tenants.",
    "evidence": "osv:CVE-2026-74790",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-74790",
      "aliases": [
        "CVE-2026-74790",
        "GHSA-5wr9-m6jw-xx44"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/scriban/scriban",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "25d148a104dd4d679a1a1932442616599e003c2f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.0.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.6.0",
            "6.5.8",
            "6.5.7",
            "6.5.6",
            "6.5.5",
            "6.5.4",
            "6.5.3",
            "6.5.2",
            "6.5.1",
            "6.5.0",
            "6.4.0",
            "6.3.0",
            "6.2.1",
            "6.2.0",
            "6.1.0",
            "6.0.0",
            "5.12.1",
            "5.12.0",
            "5.11.0",
            "5.10.0",
            "5.9.1",
            "5.9.0",
            "5.8.0",
            "5.7.0",
            "5.6.0",
            "5.5.2",
            "5.5.1",
            "5.5.0",
            "5.4.6",
            "5.4.5",
            "5.4.4",
            "5.4.3",
            "5.4.2",
            "5.4.1",
            "5.4.0",
            "5.3.0",
            "5.2.0",
            "5.1.0",
            "5.0.0",
            "4.1.0",
            "4.0.2",
            "4.0.1",
            "4.0.0",
            "3.9.0",
            "3.8.2",
            "3.8.1",
            "3.8.0",
            "3.7.0",
            "3.4.1",
            "3.6.0",
            "3.5.0",
            "3.4.2",
            "3.4.0",
            "3.3.3",
            "3.3.2",
            "3.3.1",
            "3.3.0",
            "3.2.2",
            "3.2.1",
            "3.2.0",
            "3.1.0",
            "3.0.7",
            "3.0.6",
            "3.0.5",
            "3.0.4",
            "3.0.3",
            "3.0.2",
            "3.0.1",
            "3.0.0",
            "2.1.4",
            "2.1.3",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "v2.0.1",
            "v2.0.0",
            "v2.0.0-alpha-006",
            "v2.0.0-alpha-005",
            "v2.0.0-alpha-004",
            "v2.0.0-alpha-003",
            "v2.0.0-alpha-002",
            "v2.0.0-alpha-001",
            "v1.2.9",
            "v1.2.8",
            "v1.2.7",
            "v1.2.6",
            "v1.2.5",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.1",
            "v1.1.0",
            "v1.0.0",
            "v1.0.0-beta-006",
            "v1.0.0-beta-005",
            "v1.0.0-beta-004",
            "v1.0.0-beta-003",
            "v1.0.0-beta-002",
            "v1.0.0-beta-001",
            "v0.16.0",
            "v0.15.0",
            "v0.14.0",
            "v0.13.0",
            "v0.12.1",
            "v0.12.0",
            "v0.11.0",
            "v0.10.0",
            "v0.9.1",
            "v0.9.0",
            "v0.7.0",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.1",
            "v0.3.0",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74790.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.907391652Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74790.json",
        "https://github.com/scriban/scriban/security/advisories/GHSA-5wr9-m6jw-xx44",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74790",
        "https://www.vulncheck.com/advisories/scriban-before-memberfilter-bypass-via-templatecontext-cache"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-693"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74790.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74790",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 507607,
  "published_at": "2026-08-16T13:14:14.417+00:00"
}