{"id":"CVE-2021-39131","aliases":["EUVD-2021-1506","GHSA-27wq-qx3q-fxm9"],"status":"published","title":"Improper Handling of Unexpected Data Type in ced","description":"ced detects character encoding using Google’s compact_enc_det library. In ced v0.1.0, passing data types other than `Buffer` causes the Node.js process to crash. The problem has been patched in ced v1.0.0. As a workaround, before passing an argument to ced, verify it’s a `Buffer` using `Buffer.isBuffer(obj)`.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01891,"percentile":0.79885,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-241","CWE-755"],"published":"2021-08-17T19:55:09Z","modified":"2026-10-20T10:54:53Z","fixes":[{"ecosystem":"npm","package":"ced","fixed_in":["1.0.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"ced","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0"}]}]},{"source":"osv","ecosystem":"npm","package":"ced","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.0.0"}]}]}],"products":[{"vendor":"ced_project","product":"ced"},{"vendor":"sonicdoe","product":"ced"}],"references":[{"url":"https://github.com/sonicdoe/ced/security/advisories/GHSA-27wq-qx3q-fxm9","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/sonicdoe/ced/commit/a4d9f10b6bf1cd468d1a5b9a283cdf437f8bb7b3","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/sonicdoe/ced/releases/tag/v1.0.0","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39131","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-27wq-qx3q-fxm9"},{"url":"https://github.com/sonicdoe/ced","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-39131","title":"Improper Handling of Unexpected Data Type in ced","description":"ced detects character encoding using Google’s compact_enc_det library. In ced v0.1.0, passing data types other than `Buffer` causes the Node.js process to crash. The problem has been patched in ced v1.0.0. As a workaround, before passing an argument to ced, verify it’s a `Buffer` using `Buffer.isBuffer(obj)`.","status":"published","published":"2021-08-17T19:55:09Z","modified":"2024-08-04T01:58:17.881Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-241"],"updated_at":"2026-11-02T14:33:09.540052Z"}],"euvd":[{"id":"EUVD-2021-1506","description":"ced detects character encoding using Google’s compact_enc_det library. In ced v0.1.0, passing data types other than `Buffer` causes the Node.js process to crash. The problem has been patched in ced v1.0.0. As a workaround, before passing an argument to ced, verify it’s a `Buffer` using `Buffer.isBuffer(obj)`.","status":"published","published":"2021-08-17T19:55:09Z","modified":"2024-08-04T01:58:17Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T03:24:24.305495Z"}],"ghsa":[{"id":"GHSA-27wq-qx3q-fxm9","title":"Improper Handling of Unexpected Data Type in ced","description":"### Impact\n\nIn ced v0.1.0, passing data types other than `Buffer` causes the Node.js process to crash.\n\n### Patches\n\nThe problem has been patched in [ced v1.0.0](https://github.com/sonicdoe/ced/releases/tag/v1.0.0). You can upgrade from v0.1.0 without any breaking changes.\n\n### Workarounds\n\nBefore passing an argument to ced, verify it’s a `Buffer` using [`Buffer.isBuffer(obj)`](https://nodejs.org/api/buffer.html#buffer_static_method_buffer_isbuffer_obj).\n\n### CVSS score\n\n[CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:O/RC:C](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:O/RC:C)\n\nBase Score: 7.5 (High)\nTemporal Score: 7.2 (High)\n\nSince ced is a library, the scoring is based on the “[reasonable worst-case implementation scenario](https://www.first.org/cvss/v3.1/user-guide#3-7-Scoring-Vulnerabilities-in-Software-Libraries-and-Similar)”, namely, accepting data from untrusted sources over a network and passing it directly to ced. Depending on your specific implementation, the vulnerability’s severity in your program may be different.\n\n### Proof of concept\n\n```js\nconst express = require(\"express\");\nconst bodyParser = require(\"body-parser\");\nconst ced = require(\"ced\");\n\nconst app = express();\n\napp.use(bodyParser.raw());\n\napp.post(\"/\", (req, res) =\u003e {\n  const encoding = ced(req.body);\n\n  res.end(encoding);\n});\n\napp.listen(3000);\n```\n\n`curl --request POST --header \"Content-Type: text/plain\" --data foo http://localhost:3000` crashes the server.\n\n### References\n\n- https://github.com/sonicdoe/ced/commit/a4d9f10b6bf1cd468d1a5b9a283cdf437f8bb7b3","status":"published","published":"2021-08-23T19:42:28Z","modified":"2023-02-01T05:06:21Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-241"],"updated_at":"2026-11-02T14:36:38.281533Z"}],"nvd":[{"id":"CVE-2021-39131","description":"ced detects character encoding using Google’s compact_enc_det library. In ced v0.1.0, passing data types other than `Buffer` causes the Node.js process to crash. The problem has been patched in ced v1.0.0. As a workaround, before passing an argument to ced, verify it’s a `Buffer` using `Buffer.isBuffer(obj)`.","status":"published","published":"2021-08-17T23:15:07.507Z","modified":"2026-06-17T04:03:07.663Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-241","CWE-755"],"updated_at":"2026-11-02T14:06:57.318236Z"}],"osv":[{"id":"CVE-2021-39131","description":"ced detects character encoding using Google’s compact_enc_det library. In ced v0.1.0, passing data types other than `Buffer` causes the Node.js process to crash. The problem has been patched in ced v1.0.0. As a workaround, before passing an argument to ced, verify it’s a `Buffer` using `Buffer.isBuffer(obj)`.","status":"published","published":"2021-08-17T23:15:07.507Z","modified":"2026-10-20T10:54:53.226870665Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:20.843843Z"},{"id":"GHSA-27wq-qx3q-fxm9","title":"Improper Handling of Unexpected Data Type in ced","description":"### Impact\n\nIn ced v0.1.0, passing data types other than `Buffer` causes the Node.js process to crash.\n\n### Patches\n\nThe problem has been patched in [ced v1.0.0](https://github.com/sonicdoe/ced/releases/tag/v1.0.0). You can upgrade from v0.1.0 without any breaking changes.\n\n### Workarounds\n\nBefore passing an argument to ced, verify it’s a `Buffer` using [`Buffer.isBuffer(obj)`](https://nodejs.org/api/buffer.html#buffer_static_method_buffer_isbuffer_obj).\n\n### CVSS score\n\n[CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:O/RC:C](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:O/RC:C)\n\nBase Score: 7.5 (High)\nTemporal Score: 7.2 (High)\n\nSince ced is a library, the scoring is based on the “[reasonable worst-case implementation scenario](https://www.first.org/cvss/v3.1/user-guide#3-7-Scoring-Vulnerabilities-in-Software-Libraries-and-Similar)”, namely, accepting data from untrusted sources over a network and passing it directly to ced. Depending on your specific implementation, the vulnerability’s severity in your program may be different.\n\n### Proof of concept\n\n```js\nconst express = require(\"express\");\nconst bodyParser = require(\"body-parser\");\nconst ced = require(\"ced\");\n\nconst app = express();\n\napp.use(bodyParser.raw());\n\napp.post(\"/\", (req, res) =\u003e {\n  const encoding = ced(req.body);\n\n  res.end(encoding);\n});\n\napp.listen(3000);\n```\n\n`curl --request POST --header \"Content-Type: text/plain\" --data foo http://localhost:3000` crashes the server.\n\n### References\n\n- https://github.com/sonicdoe/ced/commit/a4d9f10b6bf1cd468d1a5b9a283cdf437f8bb7b3","status":"published","published":"2021-08-23T19:42:28Z","modified":"2026-07-08T06:28:22.894088623Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-241"],"updated_at":"2026-11-02T15:46:33.956911Z"}]}}