Publish GHSA-mqpr-49jj-32rc

Author: advisory-database[bot]

advisories/github-reviewed/2026/02/GHSA-mqpr-49jj-32rc/GHSA-mqpr-49jj-32rc.json

@@ -0,0 +1,86 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-mqpr-49jj-32rc",
+  "modified": "2026-02-26T15:58:34Z",
+  "published": "2026-02-26T15:58:34Z",
+  "aliases": [],
+  "summary": "n8n: Webhook Forgery on Github Webhook Trigger",
+  "details": "## Impact\nAn attacker who knows the webhook URL of a workflow using the GitHub Webhook Trigger node could send unsigned POST requests and trigger the workflow with arbitrary data. The node did not implement the HMAC-SHA256 signature verification that GitHub provides to authenticate webhook deliveries, allowing any party to spoof GitHub webhook events.\n\n## Patches\nThe issue has been fixed in n8n versions 2.5.0 and 1.123.15. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Limit workflow creation and editing permissions to fully trusted users only.\n- Restrict network access to the n8n webhook endpoint to known GitHub webhook IP ranges.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N"
+    },
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "npm",
+        "name": "n8n"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "1.123.15"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "npm",
+        "name": "n8n"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "2.0.0"
+            },
+            {
+              "fixed": "2.5.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-mqpr-49jj-32rc"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/n8n-io/n8n/commit/a19347a6bc9a96d5065ac77d25a811e46178c578"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/n8n-io/n8n/commit/afe322325502f448b33bff1db1575e4447c28a36"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/n8n-io/n8n"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-290"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-02-26T15:58:34Z",
+    "nvd_published_at": null
+  }
+}