rack (RubyGems) — known CVEs & security advisories

Known CVE vulnerabilities and GitHub Security Advisories affecting the RubyGems package rack, with affected version ranges, CVSS severity, EPSS exploit prediction, and CISA KEV status.

CVEs (51)

• CVE-2022-30123 — CVSS 10.0 (critical): A sequence injection vulnerability exists in Rack <2.0.9.1, <2.1.4.1 and <2.2.3.1 which could allow is a possible shell escape in the Lint…
• CVE-2020-8161 — CVSS 8.6 (high): A directory traversal vulnerability exists in rack < 2.2.0 that allows an attacker perform directory traversal vulnerability in the…
• CVE-2026-22860 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory`’s path check used a string…
• CVE-2026-34829 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Multipart::Parser only wraps the request…
• CVE-2026-34827 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Multipart::Parser#…
• CVE-2025-61919 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. Prior to versions 2.2.20, 3.1.18, and 3.2.3, `Rack::Request#POST` reads the entire request…
• CVE-2018-16470 — CVSS 7.5 (high): There is a possible DoS vulnerability in the multipart parser in Rack before 2.0.6. Specially crafted requests can cause the multipart…
• CVE-2025-59830 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. Prior to version 2.2.18, Rack::QueryParser enforces its params_limit only for parameters…
• CVE-2026-34785 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Static determines whether a request should…
• CVE-2023-27530 — CVSS 7.5 (high): A DoS vulnerability exists in Rack <v3.0.4.2, <v2.2.6.3, <v2.1.4.3 and <v2.0.9.3 within in the Multipart MIME parsing code in which could…
• CVE-2025-61772 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, `Rack::Multipart::Parser` can accumulate…
• CVE-2025-61771 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, ``Rack::Multipart::Parser` stores non-file…
• CVE-2025-27111 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. The Rack::Sendfile middleware logs unsanitised header values from the X-Sendfile-Type header…
• CVE-2025-27610 — CVSS 7.5 (high): Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.13, 3.0.14, and 3.1.12, `Rack::Static` can serve…
• CVE-2025-61770 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, `Rack::Multipart::Parser` buffers the entire…
• CVE-2025-46727 — CVSS 7.5 (high): Rack is a modular Ruby web server interface. Prior to versions 2.2.14, 3.0.16, and 3.1.14, `Rack::QueryParser` parses query strings and…
• CVE-2020-8184 — CVSS 7.5 (high): A reliance on cookies without validation/integrity check security vulnerability exists in rack < 2.2.3, rack < 2.1.4 that makes it is…
• CVE-2022-30122 — CVSS 7.5 (high): A possible denial of service vulnerability exists in Rack <2.0.9.1, <2.1.4.1 and <2.2.3.1 in the multipart parsing component of Rack.
• CVE-2022-44570 — CVSS 7.5 (high): A denial of service vulnerability in the Range header parsing component of Rack >= 1.5.0. A Carefully crafted input can cause the Range…
• CVE-2022-44571 — CVSS 7.5 (high): There is a denial of service vulnerability in the Content-Disposition parsingcomponent of Rack fixed in 2.0.9.2, 2.1.4.2, 2.2.4.1, 3.0.0.1…
• CVE-2022-44572 — CVSS 7.5 (high): A denial of service vulnerability in the multipart parsing component of Rack fixed in 2.0.9.2, 2.1.4.2, 2.2.4.1 and 3.0.0.1 could allow an…
• CVE-2025-25184 — CVSS 6.5 (medium): Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.11, 3.0.12, and 3.1.10, Rack::CommonLogger can be…
• CVE-2024-39316 — CVSS 6.5 (medium): Rack is a modular Ruby web server interface. Starting in version 3.1.0 and prior to version 3.1.5, Regular Expression Denial of Service…
• CVE-2019-16782 — CVSS 6.3 (medium): There's a possible information leak / session hijack vulnerability in Rack (RubyGem rack). This vulnerability is patched in versions 1.6.12…
• CVE-2018-16471 — CVSS 6.1 (medium): There is a possible XSS vulnerability in Rack before 2.0.6 and 1.6.11. Carefully crafted requests can impact the data returned by the…
• CVE-2026-34830 — CVSS 5.9 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Sendfile#map_accel_path interpolates the…
• CVE-2024-26141 — CVSS 5.8 (medium): Rack is a modular Ruby web server interface. Carefully crafted Range headers can cause a server to respond with an unexpectedly large…
• CVE-2025-61780 — CVSS 5.8 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.20, 3.1.18, and 3.2.3, a possible information disclosure vulnerability…
• CVE-2026-25500 — CVSS 5.4 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory` generates an HTML directory…
• CVE-2026-34763 — CVSS 5.3 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root…
• CVE-2026-34786 — CVSS 5.3 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Static#applicable_rules evaluates several…
• CVE-2026-34826 — CVSS 5.3 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.get_byte_ranges parses the HTTP Range…
• CVE-2024-26146 — CVSS 5.3 (medium): Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected…
• CVE-2024-25126 — CVSS 5.3 (medium): Rack is a modular Ruby web server interface. Carefully crafted content type headers can cause Rack’s media type parser to take much…
• CVE-2023-27539 — CVSS 5.3 (medium): There is a denial of service vulnerability in the header parsing component of Rack.
• CVE-2025-49007 — CVSS 5.3 (medium): Rack is a modular Ruby web server interface. Starting in version 3.1.0 and prior to version 3.1.16, there is a denial of service…
• CVE-2026-34230 — CVSS 5.3 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.select_best_encoding processes…
• CVE-2013-0263 — CVSS 5.1 (medium): Rack::Session::Cookie in Rack 1.5.x before 1.5.2, 1.4.x before 1.4.5, 1.3.x before 1.3.10, 1.2.x before 1.2.8, and 1.1.x before 1.1.6…
• CVE-2015-3225 — CVSS 5.0 (medium): lib/rack/utils.rb in Rack before 1.5.4 and 1.6.x before 1.6.2, as used with Ruby on Rails 3.x and 4.x and other products, allows remote…
• CVE-2013-0183 — CVSS 5.0 (medium): multipart/parser.rb in Rack 1.3.x before 1.3.8 and 1.4.x before 1.4.3 allows remote attackers to cause a denial of service (memory…
• CVE-2011-5036 — CVSS 5.0 (medium): Rack before 1.1.3, 1.2.x before 1.2.5, and 1.3.x before 1.3.6 computes hash values for form parameters without restricting the ability to…
• CVE-2026-32762 — CVSS 4.8 (medium): Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwarded_val…
• CVE-2026-26962 — CVSS 4.8 (medium): Rack is a modular Ruby web server interface. From version 3.2.0 to before version 3.2.6, Rack::Multipart::Parser unfolds folded multipart…
• CVE-2026-34831 — CVSS 4.8 (medium): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Files#fail sets the Content-Length response…
• CVE-2026-34835 — CVSS 4.8 (medium): Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Request parses…
• CVE-2013-0262 — CVSS 4.3 (medium): rack/file.rb (Rack::File) in Rack 1.5.x before 1.5.2 and 1.4.x before 1.4.5 allows attackers to access arbitrary files outside the intended…
• CVE-2013-0184 — CVSS 4.3 (medium): Unspecified vulnerability in Rack::Auth::AbstractRequest in Rack 1.1.x before 1.1.5, 1.2.x before 1.2.7, 1.3.x before 1.3.9, and 1.4.x…
• CVE-2012-6109 — CVSS 4.3 (medium): lib/rack/multipart.rb in Rack before 1.1.4, 1.2.x before 1.2.6, 1.3.x before 1.3.7, and 1.4.x before 1.4.2 uses an incorrect regular…
• CVE-2025-32441 — CVSS 4.2 (medium): Rack is a modular Ruby web server interface. Prior to version 2.2.14, when using the `Rack::Session::Pool` middleware, simultaneous rack…
• CVE-2025-46336 — CVSS 4.2 (medium): Rack::Session is a session management implementation for Rack. In versions starting from 2.0.0 to before 2.1.1, when using the…
• CVE-2026-26961 — CVSS 3.7 (low): Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Multipart::Parser extracts the boundary…