HTTP Request Smuggling

guzzlehttp/psr7 is vulnerable to HTTP Request Smuggling. The vulnerability exists in assertHeader function of MessageTrait.php due to improper header parsing which allows an attacker to sneak in a newline \n into both the header name and value, resulting in HTTP cache poisoning and phishing attac...

Improper Input Validation

guzzlehttp/psr7 is vulnerable to improper input validation. The vulnerability exists in the normalizeHeaderValue function in the MessageTrait.php file allowing an attacker to modify the new line character with an untrusted value...