{
  "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": "2.33.0"
              },
              {
                "fixed": "2.33.4"
              },
              {
                "introduced": "2.34.0"
              },
              {
                "last_affected": "2.34.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "430e6e597ab43d2326aa11cd30fcf633766fca31"
            },
            {
              "introduced": "60cc920c40d6090816b8f7418f10ac645814fe9f"
            },
            {
              "fixed": "14c9aef0552fb4776501ca1c4589451891dd0ef4"
            },
            {
              "introduced": "b533ecd6856fef9ba7ca096d14b1f798b9933ff6"
            },
            {
              "last_affected": "b533ecd6856fef9ba7ca096d14b1f798b9933ff6"
            }
          ],
          "repo": "https://github.com/n8n-io/n8n",
          "type": "GIT"
        }
      ],
      "versions": [
        "2.34.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-c4f6-59xq-95ww"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77069.json"
  },
  "details": "n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no SSRF guard. A user with credential-creation permissions can set the access-token URL to an internal address and complete the OAuth2 flow, causing n8n to send a fixed-shape token-exchange POST to that target and reflect its response body back to the attacker (limited to what the target returns to this specific request).",
  "id": "CVE-2026-77069",
  "modified": "2026-09-03T03:30:31.501455676Z",
  "published": "2026-08-20T11:21:05.599Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77069.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-c4f6-59xq-95ww"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77069"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/n8n-before-ssrf-protection-bypass-via-oauth2"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "n8n before 1.123.69 SSRF Protection Bypass via OAuth2"
}