Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/207090?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/207090?format=api", "purl": "pkg:gem/websocket-extensions@0.1.3", "type": "gem", "namespace": "", "name": "websocket-extensions", "version": "0.1.3", "qualifiers": {}, "subpath": "", "is_vulnerable": true, "next_non_vulnerable_version": "0.1.5", "latest_non_vulnerable_version": "0.1.5", "affected_by_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/33582?format=api", "vulnerability_id": "VCID-u29q-3x9x-73da", "summary": "Regular Expression Denial of Service in websocket-extensions (RubyGem)\n### Impact\n\nThe ReDoS flaw allows an attacker to exhaust the server's capacity to process incoming requests by sending a WebSocket handshake request containing a header of 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 a repeating two-byte sequence of a backslash and some other character. The parser takes exponential time to reject this header as invalid, and this will block the processing of any other work on the same thread. Thus if you are running a single-threaded server, such a request can render your service completely unavailable.\n\n### Patches\n\nUsers should upgrade to version 0.1.5.\n\n### Workarounds\n\nThere are no known work-arounds other than disabling any public-facing WebSocket 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-2020-7663.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-2020-7663.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2020-7663", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85149", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85151", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85148", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85055", "published_at": "2026-04-01T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85127", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.8513", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85133", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85118", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85111", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.8509", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85086", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.0242", "scoring_system": "epss", "scoring_elements": "0.85068", "published_at": "2026-04-02T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-7663" }, { "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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7663", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7663" }, { "reference_url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L" } ], "url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml" }, { "reference_url": "https://github.com/faye/websocket-extensions-ruby", "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-ruby" }, { "reference_url": "https://github.com/faye/websocket-extensions-ruby/commit/aa156a439da681361ed6f53f1a8131892418838b", "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-ruby/commit/aa156a439da681361ed6f53f1a8131892418838b" }, { "reference_url": "https://github.com/faye/websocket-extensions-ruby/security/advisories/GHSA-g6wq-qcwm-j5g2", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3", "scoring_elements": "" }, { "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-ruby/security/advisories/GHSA-g6wq-qcwm-j5g2" }, { "reference_url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/websocket-extensions/CVE-2020-7663.yml", "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/rubysec/ruby-advisory-db/blob/master/gems/websocket-extensions/CVE-2020-7663.yml" }, { "reference_url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00031.html", "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://lists.debian.org/debian-lts-announce/2020/08/msg00031.html" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7663", "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-2020-7663" }, { "reference_url": "https://snyk.io/vuln/SNYK-RUBY-WEBSOCKETEXTENSIONS-570830", "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-RUBY-WEBSOCKETEXTENSIONS-570830" }, { "reference_url": "https://usn.ubuntu.com/4502-1", "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://usn.ubuntu.com/4502-1" }, { "reference_url": "https://usn.ubuntu.com/4502-1/", "reference_id": "", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/4502-1/" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=1845978", "reference_id": "1845978", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1845978" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=964274", "reference_id": "964274", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=964274" }, { "reference_url": "https://github.com/advisories/GHSA-g6wq-qcwm-j5g2", "reference_id": "GHSA-g6wq-qcwm-j5g2", "reference_type": "", "scores": [ { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-g6wq-qcwm-j5g2" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2020:4366", "reference_id": "RHSA-2020:4366", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2020:4366" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/73390?format=api", "purl": "pkg:gem/websocket-extensions@0.1.5", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/websocket-extensions@0.1.5" } ], "aliases": [ "CVE-2020-7663", "GHSA-g6wq-qcwm-j5g2" ], "risk_score": 4.0, "exploitability": "0.5", "weighted_severity": "8.0", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-u29q-3x9x-73da" } ], "fixing_vulnerabilities": [], "risk_score": "4.0", "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/websocket-extensions@0.1.3" }