CVE-2026-55603

http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Content-Type is multipart/form-data, it rebuilds the body with...

CVE-2026-55603 http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in `fixRequestBody`

http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Content-Type is multipart/form-data, it rebuilds the body with...

CVE-2026-55603

CVE-2026-55603 affects http-proxy-middleware (Node.js). In versions 3.0.4–3.0.7 and 4.1.1, fixRequestBody() rebuilds multipart/form-data by interpolating req.body into the wire format without neutralizing CR/LF. This can let an attacker inject a new multipart part (via unescaped CRLF in keys/valu...

CVE-2026-53537 Python-Multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, parseoptionsheader parsed Content-Disposition and Content-Type headers with email.message.Message, which transparently applies RFC 2231/5987 decoding. The extended parameter syntax filename=charset'lang'value, name=...,...

CVE-2026-53537

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, parseoptionsheader parsed Content-Disposition and Content-Type headers with email.message.Message, which transparently applies RFC 2231/5987 decoding. The extended parameter syntax filename=charset'lang'value, name=...,...

http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in `fixRequestBody`

Summary fixRequestBody is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Content-Type is multipart/form-data, it rebuilds the body with handlerFormDataBodyData, which interpolates each req.body key and value directly in...

NPM: http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in `fixRequestBody`

NPM: http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in fixRequestBody vulnerability discovered by ? in WordPress Npm http-proxy-middleware versions = 3.0.4, 3.0.7...

PT-2026-50735

Name of the Vulnerable Software and Affected Versions http-proxy-middleware versions 3.0.4 through 3.0.6 http-proxy-middleware versions prior to 4.1.1 Description An issue exists in the fixRequestBody helper function when the outgoing Content-Type is set to multipart/form-data. The function uses...

Interpretation Conflict

Overview python-multipart is an A streaming multipart parser for Python Affected versions of this package are vulnerable to Interpretation Conflict through the parseoptionsheader function. An attacker can bypass field name or filename-based access controls, or manipulate file upload destinations ...

python-multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters

Summary parseoptionsheader parsed Content-Disposition and Content-Type headers with email.message.Message, which transparently applies RFC 2231/5987 decoding. The extended parameter syntax filename=charset'lang'value, name=..., and the filename0/filename1 continuation form is decoded and surfaced...

CVE-2026-5079 multer vulnerable to Denial of Service via deeply nested field names

Impact: multer versions 1.0.0 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service via deeply nested field names in multipart form data. The append-field dependency parses bracket notation in field names with no limit on nesting depth, allowing an attacker to force allocation of...

PT-2026-49233

Name of the Vulnerable Software and Affected Versions multer versions 1.0.0 through 2.1.1 multer version 3.0.0-alpha.1 Description A Denial of Service issue exists due to the way the append-field dependency parses bracket notation in field names within multipart form data. Because there is no lim...

CVE-2026-12143

form-data is a library for creating readable multipart/form-data streams. In versions through 4.0.5, the field argument to FormDataappend and the filename option are concatenated verbatim into the Content-Disposition header without escaping carriage return CR, line feed LF, or double-quote "...

PT-2026-48950

Name of the Vulnerable Software and Affected Versions form-data versions prior to 2.5.6 form-data versions prior to 3.0.5 form-data versions prior to 4.0.6 Description The field argument to FormDataappend and the filename option are concatenated verbatim into the Content-Disposition header withou...

CVE-2026-49756 Multipart form-data header injection in Req via unescaped name/filename/content_type

Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in wojtekmach Req allows multipart parameter smuggling via attacker-influenced part metadata. Req.Utils.encodeformpart/2 in lib/req/utils.ex builds the per-part headers by interpolating the caller-supplied name, filename, an...

CVE-2026-49756 Multipart form-data header injection in Req via unescaped name/filename/content_type

Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in wojtekmach Req allows multipart parameter smuggling via attacker-influenced part metadata. Req.Utils.encodeformpart/2 in lib/req/utils.ex builds the per-part headers by interpolating the caller-supplied name, filename, an...

CVE-2026-49756

CVE-2026-49756 describes a CRLF injection in Req.Utils.encode_form_part/2 of the Elixir Req library. User-controlled name, filename, or content_type are interpolated into Content-Disposition and Content-Type without escaping, allowing CRLFs to terminate header lines and add smuggled parts. This e...

EEF-CVE-2026-49756 Multipart form-data header injection in Req via unescaped name/filename/content_type

Summary Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in wojtekmach Req allows multipart parameter smuggling via attacker-influenced part metadata. Req.Utils.encodeformpart/2 in lib/req/utils.ex builds the per-part headers by interpolating the caller-supplied name,...

PT-2026-47333

Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in wojtekmach Req allows multipart parameter smuggling via attacker-influenced part metadata. Req.Utils.encode form part/2 in lib/req/utils.ex builds the per-part headers by interpolating the caller-supplied name, filename,...

CVE-2026-8161

[email protected] and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as proto, constructor, or toString, the parser invokes .push on the inherited...