{"id":"CVE-2017-16098","aliases":["EUVD-2018-0386","GHSA-9cp3-fh5x-xfcj"],"status":"published","title":"Regular Expression Denial of Service in charset","description":"charset 1.0.0 and below are vulnerable to regular expression denial of service. Input of around 50k characters is required for a slow down of around 2 seconds. Unless node was compiled using the -DHTTP_MAX_HEADER_SIZE= option the default header max length is 80kb, so the impact of the ReDoS is relatively low.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01631,"percentile":0.76387,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2018-06-07T02:00:00Z","modified":"2026-10-20T10:48:16Z","fixes":[{"ecosystem":"npm","package":"charset","fixed_in":["1.0.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"charset","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1"}]}]},{"source":"osv","ecosystem":"npm","package":"charset","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.0.1"}]}]}],"products":[{"vendor":"charset_project","product":"charset"},{"vendor":"hackerone","product":"charset node module"}],"references":[{"url":"https://nodesecurity.io/advisories/524","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/node-modules/charset/issues/10","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-16098","tags":["advisory"]},{"url":"https://github.com/node-modules/charset/pull/11","tags":["web"]},{"url":"https://github.com/node-modules/charset/commit/effda0c48c51b47a47f4cad7db0c51ee7407cc1b","tags":["web"]},{"url":"https://github.com/advisories/GHSA-9cp3-fh5x-xfcj"},{"url":"https://github.com/node-modules/charset","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2017-16098","description":"charset 1.0.0 and below are vulnerable to regular expression denial of service. Input of around 50k characters is required for a slow down of around 2 seconds. Unless node was compiled using the -DHTTP_MAX_HEADER_SIZE= option the default header max length is 80kb, so the impact of the ReDoS is relatively low.","status":"published","published":"2018-06-07T02:00:00Z","modified":"2024-09-16T18:03:05.636Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:33:21.453505Z"}],"euvd":[{"id":"EUVD-2018-0386","description":"charset 1.0.0 and below are vulnerable to regular expression denial of service. Input of around 50k characters is required for a slow down of around 2 seconds. Unless node was compiled using the -DHTTP_MAX_HEADER_SIZE= option the default header max length is 80kb, so the impact of the ReDoS is relatively low.","status":"published","published":"2018-06-07T02:00:00Z","modified":"2024-09-16T18:03:05Z","updated_at":"2026-11-03T00:55:36.293033Z"}],"ghsa":[{"id":"GHSA-9cp3-fh5x-xfcj","title":"Regular Expression Denial of Service in charset","description":"Affected versions of `charset` are susceptible to a regular expression denial of service.\n\nThe amplification on this vulnerability is relatively low - it takes around 2 seconds for the engine to execute on a malicious input which is 50,000 characters in length.\n\n\nIf node was compiled using the `-DHTTP_MAX_HEADER_SIZE` however, the impact of the vulnerability can be significant, as the primary limitation for the vulnerability is the default max HTTP header length in node.\n\n\n## Recommendation\n\nUpdate to version 1.0.1 or later.","status":"published","published":"2018-08-09T20:55:46Z","modified":"2023-03-31T15:44:21Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:36:48.905887Z"}],"nvd":[{"id":"CVE-2017-16098","description":"charset 1.0.0 and below are vulnerable to regular expression denial of service. Input of around 50k characters is required for a slow down of around 2 seconds. Unless node was compiled using the -DHTTP_MAX_HEADER_SIZE= option the default header max length is 80kb, so the impact of the ReDoS is relatively low.","status":"published","published":"2018-06-07T02:29:02.113Z","modified":"2026-06-17T01:08:47.603Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/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-400"],"updated_at":"2026-11-02T14:04:17.638656Z"}],"osv":[{"id":"CVE-2017-16098","description":"charset 1.0.0 and below are vulnerable to regular expression denial of service. Input of around 50k characters is required for a slow down of around 2 seconds. Unless node was compiled using the -DHTTP_MAX_HEADER_SIZE= option the default header max length is 80kb, so the impact of the ReDoS is relatively low.","status":"published","published":"2018-06-07T02:29:02.113Z","modified":"2026-10-20T10:48:16.171234634Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:04.853379Z"},{"id":"GHSA-9cp3-fh5x-xfcj","title":"Regular Expression Denial of Service in charset","description":"Affected versions of `charset` are susceptible to a regular expression denial of service.\n\nThe amplification on this vulnerability is relatively low - it takes around 2 seconds for the engine to execute on a malicious input which is 50,000 characters in length.\n\n\nIf node was compiled using the `-DHTTP_MAX_HEADER_SIZE` however, the impact of the vulnerability can be significant, as the primary limitation for the vulnerability is the default max HTTP header length in node.\n\n\n## Recommendation\n\nUpdate to version 1.0.1 or later.","status":"published","published":"2018-08-09T20:55:46Z","modified":"2023-11-08T03:59:04.73298Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:43.524801Z"}]}}