CVE-2026-59882
MEDIUM
NVD
CVSS Score
4.2
Severity
MEDIUM
Published
Jul 08, 2026
Vendor
unknown
Description
guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.3, Uri::assertValidHost() does not reject URI host components containing authority delimiters, embedded ports, or malformed IPv6 brackets, allowing Uri::getHost() to disagree with the URI authority used for security or routing decisions. This issue is fixed in version 2.12.3.