CVE-2026-59882

MediumCVSS 6.5/10Last modified Oct 25, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-436

Affected software

Vendor	Product	Versions
guzzle	psr7	< 2.12.3

References

https://github.com/guzzle/psr7/commit/ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580Patch
https://github.com/guzzle/psr7/pull/811Issue Tracking, Patch
https://github.com/guzzle/psr7/releases/tag/2.12.3Product, Release Notes
https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98Mitigation, Vendor Advisory

Timeline

Published: Jul 8, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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