CVE-2026-59882

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.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/guzzle/psr7/commit/ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580	Patch
https://github.com/guzzle/psr7/pull/811	Issue Tracking Patch
https://github.com/guzzle/psr7/releases/tag/2.12.3	Product Release Notes
https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:guzzlephp:psr-7:*:*:*:*:*:*:*:*

History

17 Jul 2026, 14:29

Type	Values Removed	Values Added
First Time		Guzzlephp psr-7 Guzzlephp
CPE		cpe:2.3:a:guzzlephp:psr-7::::::::
References	~~() https://github.com/guzzle/psr7/commit/ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580 -~~	() https://github.com/guzzle/psr7/commit/ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580 - Patch
References	~~() https://github.com/guzzle/psr7/pull/811 -~~	() https://github.com/guzzle/psr7/pull/811 - Issue Tracking, Patch
References	~~() https://github.com/guzzle/psr7/releases/tag/2.12.3 -~~	() https://github.com/guzzle/psr7/releases/tag/2.12.3 - Product, Release Notes
References	~~() https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98 -~~	() https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98 - Mitigation, Vendor Advisory

08 Jul 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-08 17:17

Updated : 2026-07-17 14:29

NVD link : CVE-2026-59882

Mitre link : CVE-2026-59882

CVE.ORG link : CVE-2026-59882

JSON object : View

Products Affected

guzzlephp

psr-7

CWE

CWE-436

Interpretation Conflict

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