CVE-2026-55766

Summary (CVE-2026-55766): guzzlehttp/psr7 (PHP) before 2.12.1 is vulnerable to CRLF injection in the HTTP start-line fields (method, protocol version, reason phrase) when attacker-controlled data ends up in those fields and the message is serialized or forwarded. The flaw requires the malformed m...

GHSA-WPWQ-4J6V-78M3 guzzlehttp/guzzle: Silent HTTPS-Proxy Downgrade to Cleartext

Impact The built-in cURL handlers GuzzleHttp\Handler\CurlHandler and GuzzleHttp\Handler\CurlMultiHandler, used by default whenever the PHP cURL extension is available accept an https:// proxy — a proxy reached over a TLS-encrypted connection — through the proxy request option, client-level proxy...

CRLF injection in HTTP start-line serialization

Impact guzzlehttp/psr7 did not reject CR/LF characters in certain first-party HTTP start-line fields: the request method, protocol version, and response reason phrase. If an application placed attacker-controlled data into one of those fields and later serialized the PSR-7 message as raw HTTP/1.x...

PT-2026-50793

Name of the Vulnerable Software and Affected Versions Guzzle versions prior to 7.12.1 Description CookieJar incorrectly accepts cookies with a dot-only Domain attribute such as Domain=., Domain=.., Domain=... and whitespace-padded variants. The SetCookie::matchesDomain function removes leading...

HTTP Response Splitting

Overview Affected versions of this package are vulnerable to HTTP Response Splitting via the host component of a URI when constructing a PSR-7 Uri or Request. An attacker can inject arbitrary HTTP headers by supplying a crafted host value containing ASCII control characters, such as CRLF, which a...

CVE-2026-48998

guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Versions prior to 2.10.2 contain improper Host header validation when parsing raw HTTP request messages and when deriving a server request URI from server variables. An attacker can provide a malformed Host header containing U...

Linux Distros Unpatched Vulnerability : CVE-2022-31043

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Guzzle is an open source PHP HTTP client. In affected versions Authorization headers on requests are sensitive information. On making a request using the https...

UBUNTU-CVE-2023-29197

guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Affected versions are subject to improper header parsing. An attacker could sneak in a newline \n into both the header names and values. While the specification states that \r\n\r\n is used to terminate the header list, many...

Drupal 9.4.x < 9.4.0-rc2 Third-Party Library Vulnerability

According to its self-reported version, the instance of Drupal running on the remote web server is 9.2.x prior to 9.2.21, 9.3.x prior to 9.3.16 or 9.4.x prior to 9.4.0-rc2. Drupal uses the third-party Guzzle library for handling HTTP requests and responses to external services. Guzzle has release...

Drupal core - Moderately critical - Third-party libraries - SA-CORE-2022-010

Drupal uses the third-party Guzzle library for handling HTTP requests and responses to external services. Guzzle has released a security update which does not affect Drupal core, but may affect some contributed projects or custom code on Drupal sites. We are issuing this security advisory outside...

Drupal 9.3.x < 9.3.9 Third-Party Library Vulnerability

According to its self-reported version, the instance of Drupal running on the remote web server is 9.2.x prior to 9.2.16 or 9.3.x prior to 9.3.9. It is, therefore, affected by an improper header parsing due to its usage of a third party component, Guzzle library for handling HTTP requests and...

Drupal 9.2.x < 9.2.16 Third-Party Library Vulnerability

According to its self-reported version, the instance of Drupal running on the remote web server is 9.2.x prior to 9.2.16 or 9.3.x prior to 9.3.9. It is, therefore, affected by an improper header parsing due to its usage of a third party component, Guzzle library for handling HTTP requests and...

Drupal core - Moderately critical - Third-party libraries - SA-CORE-2022-006

Drupal uses the third-party Guzzle library for handling HTTP requests and responses to external services. Guzzle has released a security update which may affect some Drupal sites. We are issuing this security advisory outside our regular Drupal security release window schedule since Guzzle has...