CVE-2026-64785

A flaw was found in SwiftNIO HTTP/2. This vulnerability allows a remote attacker to perform HTTP request smuggling or response splitting. The issue stems from insufficient validation of incoming HTTP/2 HEADERS frames, which are parts of an HTTP/2 request. This allows special control characters,...

undici: undici: HTTP header injection via unvalidated blob-like body type property

A flaw was found in undici. An application that processes a hand-rolled blob-like request body with a type property derived from untrusted input may allow a remote attacker to inject Carriage Return Line Feed CRLF sequences. This vulnerability enables the attacker to append arbitrary HTTP headers...

undici: undici: HTTP header injection via unvalidated blob-like body type property

A flaw was found in undici. An application that processes a hand-rolled blob-like request body with a type property derived from untrusted input may allow a remote attacker to inject Carriage Return Line Feed CRLF sequences. This vulnerability enables the attacker to append arbitrary HTTP headers...

CVE-2026-59921

CVE-2026-59921 affects Netty’s HttpPostRequestEncoder. Before 4.1.136.Final and 4.2.16.Final, multipart HTTP request bodies were built by directly concatenating user-supplied filenames/field names into Content-Disposition headers without validating CRLF. This allows an attacker-controlled filenam...

CVE-2026-67182

Rouille 0.3.3 through 3.6.2 contains an HTTP request smuggling vulnerability that allows remote attackers to bypass access controls by injecting bare line feed characters 0x0A into client-supplied request header values that are copied verbatim to upstream connections without validation. Attackers...

CVE-2026-67182

Rouille 0.3.3 through 3.6.2 contains an HTTP request smuggling vulnerability that allows remote attackers to bypass access controls by injecting bare line feed characters 0x0A into client-supplied request header values that are copied verbatim to upstream connections without validation. Attackers...

CVE-2026-66753

The CVE-2026-66753 entry concerns tiny-http up to version 0.12.0, where HTTP header values can be injected with CRLF characters due to insufficient validation in header parsing/serialization. The vulnerability enables response splitting, cache poisoning, session fixation via Set-Cookie injection,...

EUVD-2026-49883

tiny-http through 0.12.0 contains an HTTP header injection vulnerability that allows attackers to inject carriage return 0x0D and line feed 0x0A bytes into HTTP header values on both request and response sides due to insufficient validation in header parsing and serialization. Attackers can explo...

CVE-2026-59920

A flaw was found in the Netty STOMP Streaming Text Oriented Messaging Protocol decoder. This vulnerability allows a remote attacker to inject arbitrary protocol frames by crafting malformed STOMP commands that contain embedded carriage return CR and line feed LF sequences. This bypasses message...

swift-nio-http2: Missing CR/LF/NUL validation in header values

Summary SwiftNIO HTTP/2 was missing validation on inbound HEADERS frames that let CR, LF, NUL, SP and other control characters reach an HTTP/1.1 backend through NIOHTTP2's HTTP/2-to-HTTP/1 codec, enabling HTTP request smuggling or response splitting. Impact Two related gaps in inbound header...

PT-2026-64153

Name of the Vulnerable Software and Affected Versions swift-nio-http2 versions prior to 1.45.0 Description SwiftNIO HTTP/2 lacks validation for inbound HEADERS frames, allowing control characters such as CR, LF, NUL, and SP to reach an HTTP/1.1 backend via the HTTP/2-to-HTTP/1 codec. This can lea...

The vulnerability affects the classes HAProxyMessage and HAProxyMessageEncoder of the Netty framework, which is used for developing network applications, servers, and client protocols. This vulnerability allows an attacker to replace the original data with malicious content.

The vulnerability of the HAProxyMessage and HAProxyMessageEncoder classes in the Netty framework for developing network applications, servers, and clients is related to the failure to handle CRLF sequences properly. Exploiting this vulnerability can allow an attacker to replace legitimate data wi...

PT-2026-63552

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.136.Final Netty versions prior to 4.2.16.Final Description Netty's HttpPostRequestEncoder constructs multipart HTTP request bodies by directly concatenating user-supplied filenames and field names into...

TencentOS Server 3: ruby:2.5 (TSSA-2026:0656)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0656 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities...

CVE-2026-47736

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, when PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer while waiting for CRLF to determine whether a PROXY v1 line is present, allowing an attacker that continuously sends...

CVE-2026-45070

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Mime\Header\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derive...

The vulnerability of the aiohttp HTTP client, related to the failure to handle CRLF sequences in HTTP headers, allows attackers to inject arbitrary HTTP headers.

The vulnerability of the aiohttp HTTP client is related to the failure to handle CRLF sequences in HTTP headers when processing the reason parameter. Exploiting this vulnerability allows an attacker who operates remotely to inject arbitrary HTTP headers...

morgan: morgan: Log forgery due to unneutralized control characters

A flaw was found in the morgan HTTP request logging middleware. The :remote-user token writes the Basic auth username to access logs without neutralizing CR/LF control characters. An unauthenticated remote attacker can inject forged log lines via a crafted Authorization header, breaking...

form-data: form-data: Form field override via CRLF injection

A flaw was found in form-data, a library for creating readable multipart/form-data streams. A remote attacker can exploit this vulnerability by injecting carriage return CR, line feed LF, or double-quote " characters into the field argument of FormDataappend or the filename option. This allows th...

PYSEC-2026-1222 BlackSheep's ClientSession is vulnerable to CRLF injection

Impact The HTTP Client implementation in BlackSheep is vulnerable to CRLF injection. Missing headers validation makes it possible for an attacker to modify the HTTP requests e.g. insert a new header or even create a new HTTP request. Exploitation requires developers to pass unsanitized user input...