{"url":"http://public2.vulnerablecode.io/api/packages/73502?format=json","purl":"pkg:npm/websocket-extensions@0.1.4","type":"npm","namespace":"","name":"websocket-extensions","version":"0.1.4","qualifiers":{},"subpath":"","is_vulnerable":false,"next_non_vulnerable_version":null,"latest_non_vulnerable_version":null,"affected_by_vulnerabilities":[],"fixing_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/33824?format=json","vulnerability_id":"VCID-gg1m-2vwq-euet","summary":"Regular Expression Denial of Service in websocket-extensions (NPM package)\n### Impact\n\nThe ReDoS flaw allows an attacker to exhaust the server's capacity to process\nincoming requests by sending a WebSocket handshake request containing a header\nof the following form:\n\n    Sec-WebSocket-Extensions: a; b=\"\\c\\c\\c\\c\\c\\c\\c\\c\\c\\c ...\n\nThat is, a header containing an unclosed string parameter value whose content is\na repeating two-byte sequence of a backslash and some other character. The\nparser takes exponential time to reject this header as invalid, and this will\nblock the processing of any other work on the same thread. Thus if you are\nrunning a single-threaded server, such a request can render your service\ncompletely unavailable.\n\n### Patches\n\nUsers should upgrade to version 0.1.4.\n\n### Workarounds\n\nThere are no known work-arounds other than disabling any public-facing\nWebSocket functionality you are operating.\n\n### References\n\n- https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions/","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-7662.json","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-7662.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2020-7662","reference_id":"","reference_type":"","scores":[{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53623","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53646","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53683","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.537","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53696","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53658","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53675","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53692","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53643","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53645","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53593","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53624","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53573","published_at":"2026-04-01T12:55:00Z"},{"value":"0.00304","scoring_system":"epss","scoring_elements":"0.53596","published_at":"2026-04-02T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2020-7662"},{"reference_url":"https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions"},{"reference_url":"https://github.com/faye/websocket-extensions-node","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/faye/websocket-extensions-node"},{"reference_url":"https://github.com/faye/websocket-extensions-node/commit/29496f6838bfadfe5a2f85dff33ed0ba33873237","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/faye/websocket-extensions-node/commit/29496f6838bfadfe5a2f85dff33ed0ba33873237"},{"reference_url":"https://github.com/faye/websocket-extensions-node/security/advisories/GHSA-g78m-2chm-r7qv","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/faye/websocket-extensions-node/security/advisories/GHSA-g78m-2chm-r7qv"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7662","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7662"},{"reference_url":"https://snyk.io/vuln/SNYK-JS-WEBSOCKETEXTENSIONS-570623","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://snyk.io/vuln/SNYK-JS-WEBSOCKETEXTENSIONS-570623"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1845982","reference_id":"1845982","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1845982"},{"reference_url":"https://github.com/advisories/GHSA-g78m-2chm-r7qv","reference_id":"GHSA-g78m-2chm-r7qv","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-g78m-2chm-r7qv"},{"reference_url":"https://access.redhat.com/errata/RHSA-2020:2796","reference_id":"RHSA-2020:2796","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2020:2796"},{"reference_url":"https://access.redhat.com/errata/RHSA-2020:2861","reference_id":"RHSA-2020:2861","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2020:2861"},{"reference_url":"https://access.redhat.com/errata/RHSA-2020:4298","reference_id":"RHSA-2020:4298","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2020:4298"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/73502?format=json","purl":"pkg:npm/websocket-extensions@0.1.4","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/websocket-extensions@0.1.4"}],"aliases":["CVE-2020-7662","GHSA-g78m-2chm-r7qv"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-gg1m-2vwq-euet"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/websocket-extensions@0.1.4"}