PT-2026-56500 · Guzzle · Psr7

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-59882

NVD

CVSS v3.1

4.2

Medium

Base vector

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

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.

Fix

Weakness Enumeration

CWE-436

Related Identifiers

CVE-2026-59882

Affected Products

Psr7

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-59882 · Security Note
• https://github.com/guzzle/psr7/pull/811 · Note
• https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98 · Note
• https://github.com/guzzle/psr7/releases/tag/2.12.3 · Note
• https://github.com/guzzle/psr7/commit/ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580 · Note