CVE-2026-55766— guzzle psr7 输入验证错误漏洞

guzzlehttp/psr7: CRLF Injection in HTTP Start-Line Serialization

guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.1, 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, for example with Message::toString() or an equivalent serializer, the serialized message could contain attacker-controlled header lines. The issue can also be reached through Message::parseRequest() or Message::parseResponse() when malformed raw messages are parsed into first-party PSR-7 objects and then serialized again. Creating or modifying a Request, Response, or other PSR-7 object alone is not sufficient. The issue requires the malformed message to be serialized and written to the network, forwarded, replayed, or otherwise processed by software that does not independently reject the malformed start line. This vulnerability is fixed in 2.12.1.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

对CRLF序列的转义处理不恰当(CRLF注入)

guzzle psr7 输入验证错误漏洞

guzzle psr7是guzzle的消息队列,Web中间件,Web服务器。 guzzle psr7 2.12.1之前版本存在输入验证错误漏洞，该漏洞源于未拒绝HTTP起始行字段中的CR/LF字符，可能导致序列化后的消息包含攻击者控制的标头行。

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