{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*",
              "cpe:2.3:a:n8n:n8n:2.34.0:*:*:*:*:node.js:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.123.69"
              },
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.33.4"
              },
              {
                "introduced": "2.34.0"
              },
              {
                "last_affected": "2.34.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "430e6e597ab43d2326aa11cd30fcf633766fca31"
            },
            {
              "introduced": "a8ecda44f7627630bc8b78cf671405157ad41c4f"
            },
            {
              "fixed": "14c9aef0552fb4776501ca1c4589451891dd0ef4"
            },
            {
              "introduced": "b533ecd6856fef9ba7ca096d14b1f798b9933ff6"
            },
            {
              "last_affected": "b533ecd6856fef9ba7ca096d14b1f798b9933ff6"
            }
          ],
          "repo": "https://github.com/n8n-io/n8n",
          "type": "GIT"
        }
      ],
      "versions": [
        "2.34.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-q3fv-295f-qfpf"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77082.json"
  },
  "details": "n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contains a regular expression denial of service (ReDoS) vulnerability in the Filter and Switch nodes, which compile user-supplied regex patterns with new RegExp() and execute them synchronously on the worker thread without complexity validation or execution timeout. A crafted regex pattern can block the worker for an extended period per data item processed, delaying other workflow executions on the same worker.",
  "id": "CVE-2026-77082",
  "modified": "2026-09-03T03:30:17.590421226Z",
  "published": "2026-08-20T11:21:13.700Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77082.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-q3fv-295f-qfpf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77082"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/n8n-before-redos-via-filter-and-switch-node"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "n8n before 1.123.69 ReDoS via Filter and Switch Node"
}