vm2: WASM Sandbox Escape (Node 25 only)

{
  "id": "56dfd78c365633568560af38e1a37fc16ec037d1cd94b25fc5e459151e2620d3",
  "url": "https://osv.dev/vulnerability/CVE-2026-26956",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "vm2: WASM Sandbox Escape (Node 25 only)",
    "summary": "vm2 is an open source vm/sandbox for Node.js. In version 3.10.4, vm2 is vulnerable to full sandbox escape with arbitrary code execution. Attacker code inside VM.run() obtains host process object and runs host commands with zero host cooperation. This issue has been patched in version 3.10.5.",
    "evidence": "osv:CVE-2026-26956",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-26956",
      "aliases": [
        "CVE-2026-26956",
        "GHSA-ffh4-j6h5-pg66"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/patriksimek/vm2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7cf744506cd2ab3544103eb5a4e64408eaec4a87"
                },
                {
                  "fixed": "408fc855f1cc1bbc2985b029465ee0e732ada433"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "= 3.10.4"
                      },
                      {
                        "last_affected": "= 3.10.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "408fc855f1cc1bbc2985b029465ee0e732ada433"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.10.5"
                  }
                ]
              }
            }
          ],
          "versions": [
            "= 3.10.4",
            "v3.10.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26956.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.191799785Z",
      "provider": "osv",
      "references": [
        "https://github.com/patriksimek/vm2/releases/tag/v3.10.5",
        "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26956.json",
        "https://access.redhat.com/security/cve/CVE-2026-26956",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26956.json",
        "https://github.com/patriksimek/vm2/security/advisories/GHSA-ffh4-j6h5-pg66",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-26956",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2466548"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-693"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26956.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-26956",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510900,
  "published_at": "2026-05-04T16:37:31.538+00:00"
}