{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/projectdiscovery/nuclei/v3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-76819"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-22T20:37:13Z",
    "nvd_published_at": "2026-09-22T17:17:25Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the Goja JavaScript engine used by Nuclei\u0027s `javascript:` protocol allows arbitrary native code execution on the scanner host when running untrusted JavaScript templates.\n\n**Affected Component**\n\nThe issue is in the Goja JavaScript runtime embedded in Nuclei\u0027s JavaScript protocol (`pkg/js/`). An out-of-bounds heap write in the engine can be exploited to achieve native code execution during template evaluation.\n\n**Description**\n\nNuclei uses the Goja engine to execute `javascript:` protocol templates. A memory safety vulnerability in Goja allows attacker-controlled JavaScript to corrupt heap memory and execute arbitrary native code on the host running Nuclei.\n\nBecause `javascript:` templates execute without the `-code` flag and unsigned JavaScript templates run by default, a malicious template from an untrusted source can trigger code execution during a normal scan. The vulnerability could also be reached through a template\u0027s `init` section, which runs during template initialization before other security checks complete.\n\n\u003e [!NOTE]\nJavaScript templates do not require the `-code` flag and are not subject to the code-template signing requirement on affected versions. Nuclei v3.11.0 adds a separate signing requirement for JavaScript templates as additional defense in depth.\n\n**Affected Users**\n\n- **CLI users** running untrusted or third-party `javascript:` templates.\n- **SDK users** who integrate Nuclei into platforms where end users can supply JavaScript templates.\n\n**Patches**\n\n- The vulnerability is fixed in Nuclei v3.10.0 by updating the Goja dependency. Upgrading is strongly recommended.\n- Fix reference: https://github.com/projectdiscovery/nuclei/pull/7467\n- Additional hardening in v3.11.0 requires cryptographic signatures for JavaScript templates: https://github.com/projectdiscovery/nuclei/pull/7514\n\n**Mitigation**\n\nUpgrade to Nuclei v3.10.0 or later. For additional protection, upgrade to v3.11.0 where JavaScript templates also require valid signatures.\n\nIn the meantime, avoid running JavaScript templates from unverified sources.\n\n**Workarounds**\n\nIf upgrading is not an option, do not run untrusted JavaScript templates. There is no configuration flag that mitigates native code execution on affected versions.\n\n**Acknowledgments**\n\nThanks to Dylan Pindur ([@dpindur](https://github.com/dpindur)) and Adam Kues ([@akues-an](https://github.com/akues-an)) of the Assetnote security research team for reporting this issue through responsible disclosure via security@projectdiscovery.io.",
  "id": "GHSA-vxg7-f2jj-jmqm",
  "modified": "2026-09-22T20:37:14Z",
  "published": "2026-09-22T20:37:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-vxg7-f2jj-jmqm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76819"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/pull/7467"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/pull/7514"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/commit/1fe6025b966cbb95ed4d9f40abfb629b6cbd27b2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/projectdiscovery/nuclei"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nuclei: Arbitrary Code Execution via Goja JavaScript Engine Vulnerability"
}