Serialize JavaScript: Cross-site scripting (XSS) via unescaped

{
  "id": "30cce4c2ccda76e0ee326b40b5b7b7e6db1de2efa5f5517081bd8e926b14c670",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-115897",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Serialize JavaScript: Cross-site scripting (XSS) via unescaped",
    "summary": "Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. Prior to 7.1.3, the function-source escaping logic does not neutralize a bare closing-script prefix when attacker-influenced function source text ends exactly at that prefix. Because each function body is escaped independently, a delimiter supplied by surrounding serialized output can terminate an HTML script element, and a later serialized value supplies injected markup that becomes a live element in the page. Exploitation requires control of a serialized function's source text, such as through a spoofed toString(). This issue is fixed in version 7.1.3.",
    "evidence": "cve:CVE-2026-115897",
    "products": [
      {
        "name": {
          "value": "serialize-javascript",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-115897",
      "aliases": [
        "CVE-2026-115897"
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 2.1,
            "attackVector": "NETWORK",
            "baseSeverity": "LOW",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
            "userInteraction": "PASSIVE",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "vulnConfidentialityImpact": "LOW"
          }
        }
      ],
      "affected": [
        {
          "vendor": "yahoo",
          "product": "serialize-javascript",
          "versions": [
            {
              "status": "affected",
              "version": "< 7.1.3"
            }
          ]
        }
      ],
      "modified": "2026-10-26T17:41:50.594Z",
      "provider": "cve",
      "references": [
        "https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v",
        "https://github.com/yahoo/serialize-javascript/pull/235",
        "https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61",
        "https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-115897",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T15:39:04.934773Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-26T17:41:50.594Z"
            }
          }
        ],
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-23T21:37:41.097Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115897",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 326375,
  "published_at": "2026-10-23T21:37:41.097+00:00"
}