Serialize JavaScript: Cross-site scripting (XSS) via unescaped in serialized function bodies

{
  "id": "0f807d13b494b4c5eed10d93d03986c894cf08b6a1ae0b960ebdf563c12dad28",
  "url": "https://osv.dev/vulnerability/CVE-2026-97711",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Serialize JavaScript: Cross-site scripting (XSS) via unescaped in serialized function bodies",
    "summary": "Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. From 7.1.1 until 7.1.2, function values serialized by serialize-javascript are not fully protected against script-closing tags in attacker-influenced function source because SCRIPT_CLOSE_REGEXP can consume a second closing tag inside one match. When the serialized function is embedded in a script element, the surviving closing tag terminates the element early and causes the remaining output to be parsed as HTML, enabling cross-site scripting in the page origin. Only function values are affected; ordinary data values and options.isJSON output are unaffected. This issue is fixed in version 7.1.2.",
    "evidence": "osv:CVE-2026-97711",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-97711",
      "aliases": [
        "CVE-2026-97711",
        "GHSA-gfhx-hw2g-v5hg"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yahoo/serialize-javascript",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8c8caa7066a52106fa719c6abb5dc69858c9f799"
                },
                {
                  "fixed": "6a73fa1ddcbe4bbee8bfb12fc1ad8c086cb1334b"
                },
                {
                  "fixed": "2bdbaaff9cb8a4639135eb24cfcd383d3fefb534"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "7.1.1"
                      },
                      {
                        "fixed": "7.1.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2bdbaaff9cb8a4639135eb24cfcd383d3fefb534"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "6a73fa1ddcbe4bbee8bfb12fc1ad8c086cb1334b"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v7.1.2"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v7.1.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97711.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.237371452Z",
      "provider": "osv",
      "references": [
        "https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97711.json",
        "https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-gfhx-hw2g-v5hg",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-97711",
        "https://github.com/yahoo/serialize-javascript/commit/2bdbaaff9cb8a4639135eb24cfcd383d3fefb534"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97711.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-97711",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522236,
  "published_at": "2026-09-29T16:00:33.534+00:00"
}