CVE-2026-21428

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...

UBUNTU-CVE-2026-21428

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...

CRLF Injection

Overview Affected versions of this package are vulnerable to CRLF Injection via the processing of untrusted HTTP headers. An attacker can access internal or external network resources by injecting carriage return and line feed characters into user-supplied headers. Remediation Upgrade cpp-httplib...

EUVD-2026-0026

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...

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...

PT-2026-4500

Name of the Vulnerable Software and Affected Versions Python email module affected versions not specified Description The BytesGenerator class within the email module did not correctly quote newlines for email headers during email message serialization. This flaw allows for header injection when ...

PT-2026-25779

Name of the Vulnerable Software and Affected Versions Authlib versions prior to 1.6.9 Description Authlib is a Python library used for building OAuth and OpenID Connect servers. A JWK Header Injection flaw exists in the library's JWS implementation, allowing an unauthenticated attacker to forge...

PT-2026-4876

Name of the Vulnerable Software and Affected Versions libsoup affected versions not specified Description A flaw exists in libsoup, an HTTP client library, related to CRLF Carriage Return Line Feed Injection. This issue occurs when an HTTP proxy is configured and the library improperly handles...

PT-2026-22384

Name of the Vulnerable Software and Affected Versions calibre versions prior to 9.4.0 Description calibre is an e-book manager for viewing, converting, editing, and cataloging e-books. A HTTP Response Header Injection exists in the calibre Content Server for versions before 9.4.0. An authenticate...

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...

PT-2026-5130

Name of the Vulnerable Software and Affected Versions libsoup affected versions not specified Description A flaw exists in libsoup where an attacker controlling the input for the Content-Disposition header can inject CRLF Carriage Return Line Feed sequences into the header value. These sequences...

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-2025-2854 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...

curl: HTTP/2 and HTTP/3 Header Injection in curl

================================================================================ VULNERABILITY REPORT: HTTP/2 and HTTP/3 Header Injection in curl ================================================================================ VULNERABILITY TYPE: Response Header Injection / HTTP Response Splittin...

curl: HTTP/3 Protocol Smuggling and Header Injection via CRLF in QPACK value conversion

A fundamental design flaw exists in how libcurl handles HTTP/3 QUIC response headers across all supported backends ngtcp2, quiche, openssl-quic. The vulnerability stems from the unsafe transcoding of binary QPACK headers HTTP/3 into the textual HTTP/1.1 format used internally by curl's pipeline...

SUSE-SU-2026:20007-1 Security update for python-tornado6

This update for python-tornado6 fixes the following issues: - CVE-2025-67724: unescaped reason argument used in HTTP headers and in HTML default error pages can be used by attackers to launch header injection or XSS attacks bsc1254903. - CVE-2025-67725: quadratic complexity of string concatenatio...

PT-2025-52588

CVE-2025-68483 - Microsoft IIS HTTP Header Injection CVE ID : CVE-2025-68483 Published : Dec. 19, 2025, 4:16 a.m. | 2 hours, 5 minutes ago Description : Rejected reason: Not used Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...