{"url":"http://public2.vulnerablecode.io/api/packages/140580?format=json","purl":"pkg:gem/sinatra@4.0.0","type":"gem","namespace":"","name":"sinatra","version":"4.0.0","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"4.2.0","latest_non_vulnerable_version":"4.2.0","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/21783?format=json","vulnerability_id":"VCID-tax5-a72w-mbhy","summary":"Sinatra is vulnerable to ReDoS through ETag header value generation\nThere is a denial of service vulnerability in the `If-Match` and `If-None-Match` header parsing component of Sinatra, if the `etag` method is used when constructing the response and you are using Ruby < 3.2.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-61921.json","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-61921.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-61921","reference_id":"","reference_type":"","scores":[{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60467","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60508","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.6052","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60506","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60523","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60534","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60526","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60484","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60505","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60518","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60497","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60481","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60438","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60433","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00397","scoring_system":"epss","scoring_elements":"0.60465","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00455","scoring_system":"epss","scoring_elements":"0.639","published_at":"2026-05-07T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-61921"},{"reference_url":"https://bugs.ruby-lang.org/issues/19104","reference_id":"","reference_type":"","scores":[{"value":"2.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-10-10T20:54:24Z/"}],"url":"https://bugs.ruby-lang.org/issues/19104"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-61921","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-61921"},{"reference_url":"https://github.com/sinatra/sinatra","reference_id":"","reference_type":"","scores":[{"value":"2.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/sinatra/sinatra"},{"reference_url":"https://github.com/sinatra/sinatra/commit/3fe8c38dc405586f7ad8f2ac748aa53e9c3615bd","reference_id":"","reference_type":"","scores":[{"value":"2.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/sinatra/sinatra/commit/3fe8c38dc405586f7ad8f2ac748aa53e9c3615bd"},{"reference_url":"https://github.com/sinatra/sinatra/commit/8ff496bd4877520599e1479d6efead39304edceb","reference_id":"","reference_type":"","scores":[{"value":"2.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/sinatra/sinatra/commit/8ff496bd4877520599e1479d6efead39304edceb"},{"reference_url":"https://github.com/sinatra/sinatra/issues/2120","reference_id":"","reference_type":"","scores":[{"value":"2.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-10-10T20:54:24Z/"}],"url":"https://github.com/sinatra/sinatra/issues/2120"},{"reference_url":"https://github.com/sinatra/sinatra/pull/1823","reference_id":"","reference_type":"","scores":[{"value":"2.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring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vulnerable to Reliance on Untrusted Inputs in a Security Decision\nVersions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied, it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. 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