PT-2026-30482

UniSharp Laravel File Manager v2.0.0-alpha7 and v2.0 contain an arbitrary file upload vulnerability that allows authenticated attackers to upload malicious files by sending multipart form data to the upload endpoint. Attackers can upload PHP files with the type parameter set to Files and execute...

EUVD-2016-10860

Snews CMS 1.7 contains an unrestricted file upload vulnerability that allows unauthenticated attackers to upload arbitrary files including PHP executables to the snewsfiles directory. Attackers can upload malicious PHP files through the multipart form-data upload endpoint and execute them by...

CVE-2016-20052

Snews CMS 1.7 contains an unrestricted file upload vulnerability that allows unauthenticated attackers to upload arbitrary files including PHP executables to the snewsfiles directory. Attackers can upload malicious PHP files through the multipart form-data upload endpoint and execute them by...

CVE-2016-20052

CVE-2016-20052 affects Snews CMS 1.7 and describes an unrestricted file upload vulnerability exploitable by unauthenticated attackers. The issue allows uploading arbitrary files—including PHP executables—to the snews_files directory via the multipart form-data upload endpoint. Attackers can then ...

SUSE CVE-2026-34827

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::Parserhandlemimehead parses quoted multipart parameters such as Content-Disposition: form-data; name="..." using repeated Stringindex searches combined with...

CVE-2026-34827

A flaw was found in Rack, a modular Ruby web server interface. An unauthenticated attacker can exploit this vulnerability by sending a specially crafted multipart/form-data request. This request, containing numerous parts with lengthy backslash-escaped parameter values, causes the system to consu...

CVE-2026-34829

A flaw was found in Rack. An unauthenticated attacker can exploit this by sending a multipart/form-data request without a Content-Length header. This allows multipart parsing to continue without a total size limit, writing uploaded file parts directly to temporary files on disk. This unbounded di...

wisp has Allocation of Resources Without Limits or Throttling

Summary A multipart form parsing bug allows any unauthenticated user to bypass configured request size limits and trigger a denial of service by exhausting server memory or disk. Details The issue is in the multipart parsing logic, specifically in multipartbody and multipartheaders. When parsing...

GHSA-8645-P2V4-73R2 wisp has Allocation of Resources Without Limits or Throttling

Summary A multipart form parsing bug allows any unauthenticated user to bypass configured request size limits and trigger a denial of service by exhausting server memory or disk. Details The issue is in the multipart parsing logic, specifically in multipartbody and multipartheaders. When parsing...

Rack's greedy multipart boundary parsing can cause parser differentials and WAF bypass.

Summary Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one rather than the first. In deployments where an upstream proxy, WAF, or intermedia...

Denial of Service (DoS)

Overview rack is a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between the so-called middleware into a singl...

Inefficient Algorithmic Complexity

Overview rack is a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between the so-called middleware into a singl...

CVE-2026-34827 Rack: Algorithmic-Complexity DoS in Rack::Multipart::Parser

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::Parserhandlemimehead parses quoted multipart parameters such as Content-Disposition: form-data; name="..." using repeated Stringindex searches combined with...

CVE-2026-34827

Rack CVE-2026-34827 describes an algorithmic-DoS in Rack::Multipart::Parser#handle_mime_head where quoted multipart parameters are parsed with repeated String#index searches and slice! prefix deletion. Affected versions are 3.0.0.beta1 up to before 3.1.21, and 3.2.0 up to before 3.2.6. An unauthe...

CVE-2026-34829 Rack: Denial of Service via Unbounded Multipart File Upload Without Content-Length

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 body in a BoundedIO when CONTENTLENGTH is present. When a multipart/form-data request is sent without a Content-Length header, such as with HTTP chunked transfe...

CVE-2026-34829 Rack: Denial of Service via Unbounded Multipart File Upload Without Content-Length

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 body in a BoundedIO when CONTENTLENGTH is present. When a multipart/form-data request is sent without a Content-Length header, such as with HTTP chunked transfe...

PT-2026-29925

Summary Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one rather than the first. In deployments where an upstream proxy, WAF, or intermedia...

PT-2026-29856

Name of the Vulnerable Software and Affected Versions Rack versions 3.0.0.beta1 through 3.1.21 and versions 3.2.0 through 3.2.6 Description Rack’s Rack::Multipart::Parserhandle mime head function parses quoted multipart parameters using repeated Stringindex searches and Stringslice! operations...

Amazon Linux 2023 : python3-tornado (ALAS2023-2026-1502)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1502 advisory. Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting...

undertow: OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded

A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParseStreamSourceChannel method to parse large form data encoding with application/x-www-form-urlencoded, the method will cause an OutOfMemory issue. This flaw allows...