CVE-2026-59882

Name	CVE-2026-59882
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
php-guzzlehttp-psr7 (PTS)	bullseye	1.7.0-1+deb11u2	vulnerable
	bookworm	2.4.5-1	vulnerable
	trixie	2.7.1-1	vulnerable
	forky	2.12.3-1	fixed
	sid	2.12.4-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
php-guzzlehttp-psr7	source	(unstable)	2.12.3-1

Notes

[trixie] - php-guzzlehttp-psr7 <no-dsa> (Minor issue)
https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98
https://github.com/guzzle/psr7/pull/811
Fixed by: https://github.com/guzzle/psr7/commit/ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580 (2.12.3)