Security advisory

{
  "id": "a4287babe392e3e735542e95e88da4c52fccefa600e5f17006efa0d864d7ab77",
  "url": "https://osv.dev/vulnerability/CVE-2026-70338",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-70338",
    "summary": "Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.",
    "evidence": "osv:CVE-2026-70338",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-70338",
      "aliases": [
        "BIT-powershell-2026-70338",
        "CVE-2026-70338"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/powershell/powershell",
              "type": "GIT",
              "events": [
                {
                  "introduced": "767990ba06f8579d69f99eec46057541374aa892"
                },
                {
                  "fixed": "7acb29279dd64e646d821f75d1cc8ad59455a9a6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.6"
                      },
                      {
                        "fixed": "7.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v7.6.3",
            "v7.6.2",
            "v7.6.1",
            "v7.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70338.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:21.010732864Z",
      "provider": "osv",
      "references": [
        "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70338"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:powershell",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.4"
                  },
                  {
                    "fixed": "7.4.19.0"
                  },
                  {
                    "introduced": "7.4"
                  },
                  {
                    "fixed": "7.4.19.0"
                  },
                  {
                    "introduced": "7.5"
                  },
                  {
                    "fixed": "7.5.10.0"
                  },
                  {
                    "introduced": "7.5"
                  },
                  {
                    "fixed": "7.5.10.0"
                  },
                  {
                    "introduced": "7.6"
                  },
                  {
                    "fixed": "7.6.5"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-70338",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430401,
  "published_at": "2026-08-11T17:19:11.52+00:00"
}