{"schema_version":1,"title":"rack (RubyGems) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 20 vulnerabilities in rack (RubyGems): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-34835, was published on 2 April 2026.","url":"https://junglewise.ai/threats/technologies/rack","json_url":"https://junglewise.ai/threats/technologies/rack.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/rack","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":5,"all_time":20,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":0,"last_365_days":14},"latest":[{"cve":"CVE-2026-34835","cvss":4.8,"epss":0.0028,"slug":"cve-2026-34835-rack-rack-request-host-allowlist-bypass-via-host-header-poisoning","title":"Rack Rack::Request host allowlist bypass via Host header poisoning","severity":"medium","exploited":false,"published_at":"2026-04-02T18:16:33.967+00:00","url":"https://junglewise.ai/threats/cve-2026-34835-rack-rack-request-host-allowlist-bypass-via-host-header-poisoning"},{"cve":"CVE-2026-34827","cvss":7.5,"epss":0.0066,"slug":"cve-2026-34827-rack-algorithmic-complexity-denial-of-service-in-multipart-parser","title":"Rack algorithmic complexity denial of service in Multipart Parser","severity":"high","exploited":false,"published_at":"2026-04-02T18:16:33.49+00:00","url":"https://junglewise.ai/threats/cve-2026-34827-rack-algorithmic-complexity-denial-of-service-in-multipart-parser"},{"cve":"CVE-2026-32762","cvss":4.8,"epss":0.0025,"slug":"cve-2026-32762-rack-interpretation-conflict-in-forwarded-header-parsing","title":"Rack interpretation conflict in Forwarded header parsing","severity":"medium","exploited":false,"published_at":"2026-04-02T18:16:27.73+00:00","url":"https://junglewise.ai/threats/cve-2026-32762-rack-interpretation-conflict-in-forwarded-header-parsing"},{"cve":"CVE-2026-26962","cvss":4.8,"epss":0.0025,"slug":"cve-2026-26962-rack-crlf-injection-in-rack-multipart-parser","title":"Rack CRLF injection in Rack::Multipart::Parser","severity":"medium","exploited":false,"published_at":"2026-04-02T18:16:26.773+00:00","url":"https://junglewise.ai/threats/cve-2026-26962-rack-crlf-injection-in-rack-multipart-parser"},{"cve":"CVE-2026-34831","cvss":4.8,"epss":0.0025,"slug":"cve-2026-34831-rack-incorrect-content-length-calculation-in-rack-files-error","title":"Rack incorrect Content-Length calculation in Rack::Files error responses","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:26.42+00:00","url":"https://junglewise.ai/threats/cve-2026-34831-rack-incorrect-content-length-calculation-in-rack-files-error"},{"cve":"CVE-2026-34830","cvss":5.9,"epss":0.004,"slug":"cve-2026-34830-rack-rack-regular-expression-injection-in-rack-sendfile","title":"Rack Rack regular expression injection in Rack::Sendfile","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:26.267+00:00","url":"https://junglewise.ai/threats/cve-2026-34830-rack-rack-regular-expression-injection-in-rack-sendfile"},{"cve":"CVE-2026-34829","cvss":7.5,"epss":0.0066,"slug":"cve-2026-34829-rack-uncontrolled-resource-consumption-in-rack-multipart-parser","title":"Rack uncontrolled resource consumption in Rack::Multipart::Parser","severity":"high","exploited":false,"published_at":"2026-04-02T17:16:26.103+00:00","url":"https://junglewise.ai/threats/cve-2026-34829-rack-uncontrolled-resource-consumption-in-rack-multipart-parser"},{"cve":"CVE-2026-34826","cvss":5.3,"epss":0.0046,"slug":"cve-2026-34826-rack-denial-of-service-via-excessive-overlapping-http-byte-ranges","title":"Rack denial of service via excessive overlapping HTTP byte ranges","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:25.88+00:00","url":"https://junglewise.ai/threats/cve-2026-34826-rack-denial-of-service-via-excessive-overlapping-http-byte-ranges"},{"cve":"CVE-2026-34786","cvss":5.3,"epss":0.0033,"slug":"cve-2026-34786-rack-rack-static-security-header-bypass-via-url-encoded-paths","title":"Rack Rack::Static security header bypass via URL-encoded paths","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:25.03+00:00","url":"https://junglewise.ai/threats/cve-2026-34786-rack-rack-static-security-header-bypass-via-url-encoded-paths"},{"cve":"CVE-2026-34785","cvss":7.5,"epss":0.0052,"slug":"cve-2026-34785-rack-rack-static-information-disclosure-via-partial-string","title":"Rack Rack::Static information disclosure via partial string matching","severity":"high","exploited":false,"published_at":"2026-04-02T17:16:24.873+00:00","url":"https://junglewise.ai/threats/cve-2026-34785-rack-rack-static-information-disclosure-via-partial-string"},{"cve":"CVE-2026-34763","cvss":5.3,"epss":0.0033,"slug":"cve-2026-34763-rack-rack-directory-information-disclosure-via-unescaped-regex","title":"Rack Rack::Directory information disclosure via unescaped regex interpolation","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:24.723+00:00","url":"https://junglewise.ai/threats/cve-2026-34763-rack-rack-directory-information-disclosure-via-unescaped-regex"},{"cve":"CVE-2026-34230","cvss":7.5,"epss":0.0048,"slug":"cve-2026-34230-rack-inefficient-algorithmic-complexity-in-rack-utils-select-best","title":"Rack inefficient algorithmic complexity in Rack::Utils.select_best_encoding","severity":"high","exploited":false,"published_at":"2026-04-02T17:16:23.57+00:00","url":"https://junglewise.ai/threats/cve-2026-34230-rack-inefficient-algorithmic-complexity-in-rack-utils-select-best"},{"cve":"CVE-2026-26961","cvss":5.3,"epss":0.0027,"slug":"cve-2026-26961-rack-interpretation-conflict-in-multipart-parser-boundary","title":"Rack interpretation conflict in Multipart Parser boundary extraction","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:21.973+00:00","url":"https://junglewise.ai/threats/cve-2026-26961-rack-interpretation-conflict-in-multipart-parser-boundary"},{"cve":"CVE-2026-22860","cvss":7.5,"epss":0.0068,"slug":"cve-2026-22860-rack-directory-traversal-in-rack-directory","title":"Rack directory traversal in Rack::Directory","severity":"high","exploited":false,"published_at":"2026-02-18T19:21:43.933+00:00","url":"https://junglewise.ai/threats/cve-2026-22860-rack-directory-traversal-in-rack-directory"},{"cve":"CVE-2025-59830","cvss":3.1,"epss":0.0057,"slug":"cve-2025-59830-rack-has-an-unsafe-default-in-rack-queryparser-allows-params","title":"Rack has an unsafe default in Rack::QueryParser allows params_limit bypass via semicolon-separated parameters","severity":"low","exploited":false,"published_at":"2025-09-25T16:39:27+00:00","url":"https://junglewise.ai/threats/cve-2025-59830-rack-has-an-unsafe-default-in-rack-queryparser-allows-params"},{"cve":"CVE-2025-49007","cvss":4,"epss":0.0056,"slug":"cve-2025-49007-redos-vulnerability-in-rack-multipart-handle-mime-head","title":"ReDoS Vulnerability in Rack::Multipart handle_mime_head","severity":"medium","exploited":false,"published_at":"2025-06-05T05:21:34+00:00","url":"https://junglewise.ai/threats/cve-2025-49007-redos-vulnerability-in-rack-multipart-handle-mime-head"},{"cve":"CVE-2025-32441","cvss":3.1,"epss":0.0023,"slug":"cve-2025-32441-rack-session-gets-restored-after-deletion","title":"Rack session gets restored after deletion","severity":"low","exploited":false,"published_at":"2025-05-08T14:45:18+00:00","url":"https://junglewise.ai/threats/cve-2025-32441-rack-session-gets-restored-after-deletion"},{"cve":"CVE-2024-39316","cvss":3.1,"epss":0.0086,"slug":"cve-2024-39316-rack-redos-vulnerability-in-http-accept-headers-parsing","title":"Rack ReDoS Vulnerability in HTTP Accept Headers Parsing","severity":"low","exploited":false,"published_at":"2024-07-03T17:03:45+00:00","url":"https://junglewise.ai/threats/cve-2024-39316-rack-redos-vulnerability-in-http-accept-headers-parsing"},{"cve":"CVE-2020-8161","cvss":3.1,"epss":0.0336,"slug":"cve-2020-8161-directory-traversal-in-rack-directory-app-bundled-with-rack","title":"Directory traversal in Rack::Directory app bundled with Rack","severity":"low","exploited":false,"published_at":"2020-07-06T21:31:02+00:00","url":"https://junglewise.ai/threats/cve-2020-8161-directory-traversal-in-rack-directory-app-bundled-with-rack"},{"cve":"CVE-2018-16470","cvss":3,"epss":0.0203,"slug":"cve-2018-16470-rack-vulnerable-to-denial-of-service","title":"Rack vulnerable to Denial of Service","severity":"low","exploited":false,"published_at":"2018-11-15T15:58:58+00:00","url":"https://junglewise.ai/threats/cve-2018-16470-rack-vulnerable-to-denial-of-service"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"nokogiri (RubyGems)","slug":"nokogiri","vulnerabilities":73,"url":"https://junglewise.ai/threats/technologies/nokogiri"},{"name":"camaleon_cms (RubyGems)","slug":"camaleon-cms","vulnerabilities":19,"url":"https://junglewise.ai/threats/technologies/camaleon-cms"},{"name":"rails-html-sanitizer (RubyGems)","slug":"rails-html-sanitizer","vulnerabilities":19,"url":"https://junglewise.ai/threats/technologies/rails-html-sanitizer"},{"name":"actionpack (RubyGems)","slug":"actionpack","vulnerabilities":15,"url":"https://junglewise.ai/threats/technologies/actionpack"},{"name":"publify_core (RubyGems)","slug":"publify-core","vulnerabilities":15,"url":"https://junglewise.ai/threats/technologies/publify-core"},{"name":"rubygems-update (RubyGems)","slug":"rubygems-update","vulnerabilities":15,"url":"https://junglewise.ai/threats/technologies/rubygems-update"},{"name":"loofah (RubyGems)","slug":"loofah","vulnerabilities":14,"url":"https://junglewise.ai/threats/technologies/loofah"},{"name":"fat_free_crm (RubyGems)","slug":"fat-free-crm","vulnerabilities":12,"url":"https://junglewise.ai/threats/technologies/fat-free-crm"},{"name":"passenger (RubyGems)","slug":"passenger","vulnerabilities":12,"url":"https://junglewise.ai/threats/technologies/passenger"},{"name":"oj (RubyGems)","slug":"oj","vulnerabilities":11,"url":"https://junglewise.ai/threats/technologies/oj"},{"name":"openc3 (RubyGems)","slug":"openc3","vulnerabilities":10,"url":"https://junglewise.ai/threats/technologies/openc3"},{"name":"jquery-rails (RubyGems)","slug":"jquery-rails","vulnerabilities":9,"url":"https://junglewise.ai/threats/technologies/jquery-rails"}],"technology":{"hub":true,"name":"rack (RubyGems)","slug":"rack","vendor":{"name":"RubyGems","slug":"rubygems","url":"https://junglewise.ai/threats/vendors/rubygems"},"aliases":[],"homepage":"https://github.com/rack/rack","repo_url":"https://github.com/rack/rack","description":"A modular interface for developing web applications in Ruby.","url":"https://junglewise.ai/threats/technologies/rack"},"most_severe":[{"cve":"CVE-2026-22860","cvss":7.5,"epss":0.0068,"slug":"cve-2026-22860-rack-directory-traversal-in-rack-directory","title":"Rack directory traversal in Rack::Directory","severity":"high","exploited":false,"published_at":"2026-02-18T19:21:43.933+00:00","url":"https://junglewise.ai/threats/cve-2026-22860-rack-directory-traversal-in-rack-directory"},{"cve":"CVE-2026-34827","cvss":7.5,"epss":0.0066,"slug":"cve-2026-34827-rack-algorithmic-complexity-denial-of-service-in-multipart-parser","title":"Rack algorithmic complexity denial of service in Multipart Parser","severity":"high","exploited":false,"published_at":"2026-04-02T18:16:33.49+00:00","url":"https://junglewise.ai/threats/cve-2026-34827-rack-algorithmic-complexity-denial-of-service-in-multipart-parser"},{"cve":"CVE-2026-34829","cvss":7.5,"epss":0.0066,"slug":"cve-2026-34829-rack-uncontrolled-resource-consumption-in-rack-multipart-parser","title":"Rack uncontrolled resource consumption in Rack::Multipart::Parser","severity":"high","exploited":false,"published_at":"2026-04-02T17:16:26.103+00:00","url":"https://junglewise.ai/threats/cve-2026-34829-rack-uncontrolled-resource-consumption-in-rack-multipart-parser"},{"cve":"CVE-2026-34785","cvss":7.5,"epss":0.0052,"slug":"cve-2026-34785-rack-rack-static-information-disclosure-via-partial-string","title":"Rack Rack::Static information disclosure via partial string matching","severity":"high","exploited":false,"published_at":"2026-04-02T17:16:24.873+00:00","url":"https://junglewise.ai/threats/cve-2026-34785-rack-rack-static-information-disclosure-via-partial-string"},{"cve":"CVE-2026-34230","cvss":7.5,"epss":0.0048,"slug":"cve-2026-34230-rack-inefficient-algorithmic-complexity-in-rack-utils-select-best","title":"Rack inefficient algorithmic complexity in Rack::Utils.select_best_encoding","severity":"high","exploited":false,"published_at":"2026-04-02T17:16:23.57+00:00","url":"https://junglewise.ai/threats/cve-2026-34230-rack-inefficient-algorithmic-complexity-in-rack-utils-select-best"},{"cve":"CVE-2026-34830","cvss":5.9,"epss":0.004,"slug":"cve-2026-34830-rack-rack-regular-expression-injection-in-rack-sendfile","title":"Rack Rack regular expression injection in Rack::Sendfile","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:26.267+00:00","url":"https://junglewise.ai/threats/cve-2026-34830-rack-rack-regular-expression-injection-in-rack-sendfile"},{"cve":"CVE-2026-34826","cvss":5.3,"epss":0.0046,"slug":"cve-2026-34826-rack-denial-of-service-via-excessive-overlapping-http-byte-ranges","title":"Rack denial of service via excessive overlapping HTTP byte ranges","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:25.88+00:00","url":"https://junglewise.ai/threats/cve-2026-34826-rack-denial-of-service-via-excessive-overlapping-http-byte-ranges"},{"cve":"CVE-2026-34786","cvss":5.3,"epss":0.0033,"slug":"cve-2026-34786-rack-rack-static-security-header-bypass-via-url-encoded-paths","title":"Rack Rack::Static security header bypass via URL-encoded paths","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:25.03+00:00","url":"https://junglewise.ai/threats/cve-2026-34786-rack-rack-static-security-header-bypass-via-url-encoded-paths"},{"cve":"CVE-2026-34763","cvss":5.3,"epss":0.0033,"slug":"cve-2026-34763-rack-rack-directory-information-disclosure-via-unescaped-regex","title":"Rack Rack::Directory information disclosure via unescaped regex interpolation","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:24.723+00:00","url":"https://junglewise.ai/threats/cve-2026-34763-rack-rack-directory-information-disclosure-via-unescaped-regex"},{"cve":"CVE-2026-26961","cvss":5.3,"epss":0.0027,"slug":"cve-2026-26961-rack-interpretation-conflict-in-multipart-parser-boundary","title":"Rack interpretation conflict in Multipart Parser boundary extraction","severity":"medium","exploited":false,"published_at":"2026-04-02T17:16:21.973+00:00","url":"https://junglewise.ai/threats/cve-2026-26961-rack-interpretation-conflict-in-multipart-parser-boundary"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}