libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning

A flaw was found in Libevent, an event notification library. An unauthenticated remote attacker can exploit a vulnerability where chunked HTTP Hypertext Transfer Protocol trailers are incorrectly merged into request headers. This allows the attacker to place security-sensitive fields in trailers,...

CVE-2025-0108

CVE-2025-0108 — Segurança Web PoC e Correção Este repositório contém um pequeno ambiente de laboratório para reproduzir e mitigar o problema CVE-2025-0108 confusão de caminho / contrabando de cabeçalhos entre Nginx e Apache. O objetivo da tarefa é demonstrar como requisições duplamente codificada...

CVE-2026-63379

A flaw was found in Libevent, an event notification library. An unauthenticated remote attacker can exploit a vulnerability where chunked HTTP Hypertext Transfer Protocol trailers are incorrectly merged into request headers. This allows the attacker to place security-sensitive fields in trailers,...

Linux Distros Unpatched Vulnerability : CVE-2026-63379

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and...

CVE-2026-75484

Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in mtrudel bandit allows an unauthenticated remote attacker to smuggle CR, LF, or NUL characters into application-visible request headers via HTTP/2. Bandit.HTTP2.Stream.readheaders/1 validates pseudo-header placement and...

EUVD-2026-63661

Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in mtrudel bandit allows an unauthenticated remote attacker to smuggle CR, LF, or NUL characters into application-visible request headers via HTTP/2. Bandit.HTTP2.Stream.readheaders/1 validates pseudo-header placement and...

CVE-2026-75484

CVE-2026-75484 is a CRLF injection vulnerability in mtrudel bandit (Elixir HTTP server), versions 1.4.0 through before 1.12.5 . The root cause is in Bandit.HTTP2.Stream.read_headers/1, which validates header structure but never inspects field values . Because HPACK carries arbitrary octets, an un...

EEF-CVE-2026-75484 HTTP/2 header field values containing CR, LF or NUL are passed to the application unvalidated in Bandit

Summary Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in mtrudel bandit allows an unauthenticated remote attacker to smuggle CR, LF, or NUL characters into application-visible request headers via HTTP/2. Bandit.HTTP2.Stream.read\headers/1 validates pseudo-header placeme...

AZL-97557 CVE-2026-63379 affecting package ntp 4.2.8p17-2

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and merges them into request headers. The fix introduces evhttpparseheadersimpl and a temporary trailer header list. An unauthenticated remote...

AZL-96903 CVE-2026-63379 affecting package libtevent 0.14.1-1

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and merges them into request headers. The fix introduces evhttpparseheadersimpl and a temporary trailer header list. An unauthenticated remote...

AZL-97533 CVE-2026-63379 affecting package mysql 8.0.46-1

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and merges them into request headers. The fix introduces evhttpparseheadersimpl and a temporary trailer header list. An unauthenticated remote...

AZL-96941 CVE-2026-63379 affecting package libevent 2.1.12-1

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and merges them into request headers. The fix introduces evhttpparseheadersimpl and a temporary trailer header list. An unauthenticated remote...

CVE-2026-63379

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and merges them into request headers. The fix introduces evhttpparseheadersimpl and a temporary trailer header list. An unauthenticated remote...

CVE-2026-63379 Libevent: HTTP Header smuggling

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and merges them into request headers. The fix introduces evhttpparseheadersimpl and a temporary trailer header list. An unauthenticated remote...

CVE-2026-63379 Libevent: HTTP Header smuggling

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttpreadtrailer and merges them into request headers. The fix introduces evhttpparseheadersimpl and a temporary trailer header list. An unauthenticated remote...

PT-2026-79147

Name of the Vulnerable Software and Affected Versions bandit versions 1.4.0 through 1.12.4 Description An improper neutralization of CRLF sequences allows an unauthenticated remote attacker to smuggle Carriage Return CR, Line Feed LF, or Null NUL characters into application-visible request header...

CVE-2026-43971

Improper Encoding or Escaping of Output vulnerability in ninenines cowlib allows Link header directive smuggling via unescaped special characters in cowlink:link/1. cowlink:dolink/1 in cowlib interpolates the target URI, rel value, and attribute keys directly into the serialized Link: header valu...

DEBIAN-CVE-2026-43971

Improper Encoding or Escaping of Output vulnerability in ninenines cowlib allows Link header directive smuggling via unescaped special characters in cowlink:link/1. cowlink:dolink/1 in cowlib interpolates the target URI, rel value, and attribute keys directly into the serialized Link: header valu...

AZL-96873 CVE-2026-43971 affecting package rabbitmq-server 3.13.7-8

Improper Encoding or Escaping of Output vulnerability in ninenines cowlib allows Link header directive smuggling via unescaped special characters in cowlink:link/1. cowlink:dolink/1 in cowlib interpolates the target URI, rel value, and attribute keys directly into the serialized Link: header valu...

CVE-2026-43971 Link Header Directive Smuggling via Unescaped target/rel/Attribute Keys in cow_link:link/1

Improper Encoding or Escaping of Output vulnerability in ninenines cowlib allows Link header directive smuggling via unescaped special characters in cowlink:link/1. cowlink:dolink/1 in cowlib interpolates the target URI, rel value, and attribute keys directly into the serialized Link: header valu...