CVE-2026-21428 cpp-httplib has CRLF injection in http headers

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.0, the writeheaders function does not check for CR & LF characters in user supplied headers, allowing untrusted header value to escape header lines. This vulnerability allows attackers to add...

PT-2026-1013

Name of the Vulnerable Software and Affected Versions cpp-httplib versions prior to 0.30.0 Description The write headers function in cpp-httplib does not properly validate user-supplied headers, specifically failing to check for carriage return CR and line feed LF characters. This allows attacker...

cpp-httplib 注入漏洞

cpp-httplib is an HTTP/HTTPS server and client library written in C++ by the individual developer yhirose. An injection vulnerability exists in versions prior to cpp-httplib 0.30.0, which stems from a failure to check for CR and LF characters in user-supplied headers, which could lead to the...

Linux Distros Unpatched Vulnerability : CVE-2026-21428

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.0, the writeheaders function does not check for CR & LF...

OESA-2025-2858 cpp-httplib security update

A C++11 single-file header-only cross platform HTTP/HTTPS library. It's extremely easy to setup. Just include httplib.h file in your code! Security Fixes: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled...

OESA-2025-2856 cpp-httplib security update

A C++11 single-file header-only cross platform HTTP/HTTPS library. It's extremely easy to setup. Just include httplib.h file in your code! Security Fixes: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled...

OESA-2025-2855 cpp-httplib security update

A C++11 single-file header-only cross platform HTTP/HTTPS library. It's extremely easy to setup. Just include httplib.h file in your code! Security Fixes: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled...

OPENSUSE-SU-2025:15844-1 cpp-httplib-devel-0.28.0-1.1 on GA media

These are all security issues fixed in the cpp-httplib-devel-0.28.0-1.1 package on the GA media of openSUSE Tumbleweed...

SUSE CVE-2025-66570

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can inject headers named REMOTEADDR, REMOTEPORT,...

SUSE CVE-2025-66577

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which...

Linux Distros Unpatched Vulnerability : CVE-2025-66577

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to...

Linux Distros Unpatched Vulnerability : CVE-2025-66570

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to...

CVE-2025-66577

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which...

CVE-2025-66570

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can inject headers named REMOTEADDR, REMOTEPORT,...

UBUNTU-CVE-2025-66577

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which...

Improper Output Neutralization for Logs

Overview Affected versions of this package are vulnerable to Improper Output Neutralization for Logs via the unconditional acceptance of attacker-supplied HTTP headers in the getclientip function. An attacker can manipulate server-visible metadata, logs, and authorization decisions by supplying...

CVE-2025-66577

cpp-httplib (C++11 single-file header) contains CVE-2025-66577. The issue arises from unconditional acceptance of client-controlled headers (X-Forwarded-For, X-Real-IP) in get_client_ip() within docker/main.cc, allowing spoofed client IPs to influence server-visible metadata, logging, and authori...

CVE-2025-66577 cpp-httplib Untrusted HTTP Header Handling: X-Forwarded-For/X-Real-IP Trust

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which...

CVE-2025-66577 cpp-httplib Untrusted HTTP Header Handling: X-Forwarded-For/X-Real-IP Trust

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which...

CVE-2025-66570 cpp-httplib Untrusted HTTP Header Handling: Internal Header Shadowing (REMOTE*/LOCAL*)

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can inject headers named REMOTEADDR, REMOTEPORT,...