Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check

{
  "id": "76f2e5196b8f2172103fb87608da11eceef5bc36b5c2c00802d21b94b29feb6b",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116580",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check",
    "summary": "Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8.",
    "evidence": "cve:CVE-2026-116580",
    "products": [
      {
        "name": {
          "value": "seroval",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-116580",
      "aliases": [
        "CVE-2026-116580"
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 7.3,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "integrityImpact": "LOW",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "LOW",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "LOW"
          }
        }
      ],
      "affected": [
        {
          "vendor": "lxsmnsyc",
          "product": "seroval",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.6.8"
            }
          ]
        }
      ],
      "modified": "2026-10-26T20:35:49.975Z",
      "provider": "cve",
      "references": [
        "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9",
        "https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2",
        "https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d",
        "https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-26T20:35:49.975Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116580",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 341978,
  "published_at": "2026-10-26T20:35:49.975+00:00"
}