CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2025-49007 – ReDoS Vulnerability in Rack::Multipart handle_mime_head
https://notcve.org/view.php?id=CVE-2025-49007
04 Jun 2025 — 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 vulnerability in the Content-Disposition parsing component of Rack. This is very similar to the previous security issue CVE-2022-44571. Carefully crafted input can cause Content-Disposition header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is used typically used in multipart parsing. • https://github.com/rack/rack/commit/4795831a0a310c2d31102749e551b38faab6401f • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 4.2EPSS: 0%CPEs: 1EXPL: 0CVE-2025-46336 – Rack session gets restored after deletion
https://notcve.org/view.php?id=CVE-2025-46336
08 May 2025 — Rack::Session is a session management implementation for Rack. In versions starting from 2.0.0 to before 2.1.1, when using the Rack::Session::Pool middleware, and provided the attacker can acquire a session cookie (already a major issue), the session may be restored if the attacker can trigger a long running request (within that same session) adjacent to the user logging out, in order to retain illicit access even after a user has attempted to logout. This issue has been patched in version 2.1.1. • https://github.com/rack/rack-session/security/advisories/GHSA-9j94-67jr-4cqj • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition CWE-613: Insufficient Session Expiration •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2025-46727 – Unbounded-Parameter DoS in Rack::QueryParser
https://notcve.org/view.php?id=CVE-2025-46727
07 May 2025 — 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 `application/x-www-form-urlencoded` bodies into Ruby data structures without imposing any limit on the number of parameters, allowing attackers to send requests with extremely large numbers of parameters. The vulnerability arises because `Rack::QueryParser` iterates over each `&`-separated key-value pair and adds it to a Hash without enforcing an upper bound on the total nu... • https://github.com/rack/rack/commit/2bb5263b464b65ba4b648996a579dbd180d2b712 • CWE-400: Uncontrolled Resource Consumption CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 4.2EPSS: 0%CPEs: 1EXPL: 0CVE-2025-32441 – Rack session gets restored after deletion
https://notcve.org/view.php?id=CVE-2025-32441
07 May 2025 — Rack is a modular Ruby web server interface. Prior to version 2.2.14, when using the `Rack::Session::Pool` middleware, simultaneous rack requests can restore a deleted rack session, which allows the unauthenticated user to occupy that session. Rack session middleware prepares the session at the beginning of request, then saves is back to the store with possible changes applied by host rack application. This way the session becomes to be a subject of race conditions in general sense over concurrent rack requ... • https://github.com/rack/rack/blob/v2.2.13/lib/rack/session/abstract/id.rb#L263-L270 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition CWE-613: Insufficient Session Expiration •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2025-27610 – Local File Inclusion in Rack::Static
https://notcve.org/view.php?id=CVE-2025-27610
10 Mar 2025 — 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 files under the specified `root:` even if `urls:` are provided, which may expose other files under the specified `root:` unexpectedly. The vulnerability occurs because `Rack::Static` does not properly sanitize user-supplied paths before serving files. Specifically, encoded path traversal sequences are not correctly validated, allowing attackers to access files outside th... • https://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583 • CWE-23: Relative Path Traversal •
CVSS: 9.8EPSS: 0%CPEs: 3EXPL: 0CVE-2025-27111 – Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection
https://notcve.org/view.php?id=CVE-2025-27111
28 Feb 2025 — Rack is a modular Ruby web server interface. The Rack::Sendfile middleware logs unsanitised header values from the X-Sendfile-Type header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection. This vulnerability is fixed in 2.2.12, 3.0.13, and 3.1.11. Nhật Thái Đỗ discovered that Rack incorrectly handled certain usernames. • https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53 • CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') CWE-117: Improper Output Neutralization for Logs •
CVSS: 9.8EPSS: 0%CPEs: 3EXPL: 0CVE-2025-25184 – Possible Log Injection in Rack::CommonLogger
https://notcve.org/view.php?id=CVE-2025-25184
12 Feb 2025 — Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.11, 3.0.12, and 3.1.11, Rack::CommonLogger can be exploited by crafting input that includes newline characters to manipulate log entries. The supplied proof-of-concept demonstrates injecting malicious content into logs. When a user provides the authorization credentials via Rack::Auth::Basic, if success, the username will be put in env['REMOTE_USER'] and later be used by Rack::CommonLogger for logging purposes. The iss... • https://github.com/rack/rack/commit/074ae244430cda05c27ca91cda699709cfb3ad8e • CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') CWE-117: Improper Output Neutralization for Logs •
CVSS: 6.8EPSS: 0%CPEs: 1EXPL: 0CVE-2024-39316 – Rack ReDoS Vulnerability in HTTP Accept Headers Parsing
https://notcve.org/view.php?id=CVE-2024-39316
02 Jul 2024 — 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 (ReDoS) vulnerability exists in the `Rack::Request::Helpers` module when parsing HTTP Accept headers. This vulnerability can be exploited by an attacker sending specially crafted `Accept-Encoding` or `Accept-Language` headers, causing the server to spend excessive time processing the request and leading to a Denial of Service (DoS). The fix for CVE-2024-26146 was not applie... • https://github.com/rack/rack/commit/412c980450ca729ee37f90a2661f166a9665e058 • CWE-1333: Inefficient Regular Expression Complexity •
CVSS: 8.6EPSS: 0%CPEs: 1EXPL: 0CVE-2024-35231 – rack-contrib vulnerable to Denial of Service due to the unconstrained value of the incoming "profiler_runs" parameter
https://notcve.org/view.php?id=CVE-2024-35231
27 May 2024 — rack-contrib provides contributed rack middleware and utilities for Rack, a Ruby web server interface. Versions of rack-contrib prior to 2.5.0 are vulnerable to denial of service due to the fact that the user controlled data `profiler_runs` was not constrained to any limitation. This would lead to allocating resources on the server side with no limitation and a potential denial of service by remotely user-controlled data. Version 2.5.0 contains a patch for the issue. rack-contrib proporciona middleware y ut... • https://github.com/rack/rack-contrib/commit/0eec2a9836329051c6742549e65a94a4c24fe6f7 • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2024-26141 – Possible DoS Vulnerability with Range Header in Rack
https://notcve.org/view.php?id=CVE-2024-26141
28 Feb 2024 — Rack is a modular Ruby web server interface. Carefully crafted Range headers can cause a server to respond with an unexpectedly large response. Responding with such large responses could lead to a denial of service issue. Vulnerable applications will use the `Rack::File` middleware or the `Rack::Utils.byte_ranges` methods (this includes Rails applications). The vulnerability is fixed in 3.0.9.1 and 2.2.8.1. • https://discuss.rubyonrails.org/t/possible-dos-vulnerability-with-range-header-in-rack/84944 • CWE-400: Uncontrolled Resource Consumption CWE-1333: Inefficient Regular Expression Complexity •