Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 8.3%
CVSS Severity
CVSS v3 Score 4.2
References
Products affected by CVE-2026-59882
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cpe:2.3:a:guzzlephp:psr-7:1.0.0
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cpe:2.3:a:guzzlephp:psr-7:1.1.0
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cpe:2.3:a:guzzlephp:psr-7:1.2.0
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cpe:2.3:a:guzzlephp:psr-7:1.2.1
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cpe:2.3:a:guzzlephp:psr-7:1.2.2
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cpe:2.3:a:guzzlephp:psr-7:1.2.3
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cpe:2.3:a:guzzlephp:psr-7:1.3.0
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cpe:2.3:a:guzzlephp:psr-7:1.3.1
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cpe:2.3:a:guzzlephp:psr-7:1.4.0
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cpe:2.3:a:guzzlephp:psr-7:1.4.1
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cpe:2.3:a:guzzlephp:psr-7:1.4.2
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cpe:2.3:a:guzzlephp:psr-7:1.5.0
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cpe:2.3:a:guzzlephp:psr-7:1.5.1
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cpe:2.3:a:guzzlephp:psr-7:1.5.2
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cpe:2.3:a:guzzlephp:psr-7:1.6.0
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cpe:2.3:a:guzzlephp:psr-7:1.6.1
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cpe:2.3:a:guzzlephp:psr-7:1.7.0
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cpe:2.3:a:guzzlephp:psr-7:1.8.0
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cpe:2.3:a:guzzlephp:psr-7:1.8.1
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cpe:2.3:a:guzzlephp:psr-7:1.8.2
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cpe:2.3:a:guzzlephp:psr-7:1.8.3
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cpe:2.3:a:guzzlephp:psr-7:1.8.4
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cpe:2.3:a:guzzlephp:psr-7:1.8.5
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cpe:2.3:a:guzzlephp:psr-7:1.9.0
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cpe:2.3:a:guzzlephp:psr-7:1.9.1
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cpe:2.3:a:guzzlephp:psr-7:2.0.0
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cpe:2.3:a:guzzlephp:psr-7:2.1.0
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cpe:2.3:a:guzzlephp:psr-7:2.1.1
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cpe:2.3:a:guzzlephp:psr-7:2.1.2
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cpe:2.3:a:guzzlephp:psr-7:2.10.0
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cpe:2.3:a:guzzlephp:psr-7:2.10.1
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cpe:2.3:a:guzzlephp:psr-7:2.10.2
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cpe:2.3:a:guzzlephp:psr-7:2.10.3
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cpe:2.3:a:guzzlephp:psr-7:2.10.4
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cpe:2.3:a:guzzlephp:psr-7:2.11.0
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cpe:2.3:a:guzzlephp:psr-7:2.11.1
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cpe:2.3:a:guzzlephp:psr-7:2.12.0
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cpe:2.3:a:guzzlephp:psr-7:2.12.1
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cpe:2.3:a:guzzlephp:psr-7:2.12.2
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cpe:2.3:a:guzzlephp:psr-7:2.2.0
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cpe:2.3:a:guzzlephp:psr-7:2.2.1
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cpe:2.3:a:guzzlephp:psr-7:2.2.2
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cpe:2.3:a:guzzlephp:psr-7:2.3.0
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cpe:2.3:a:guzzlephp:psr-7:2.4.0
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cpe:2.3:a:guzzlephp:psr-7:2.4.1
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cpe:2.3:a:guzzlephp:psr-7:2.4.2
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cpe:2.3:a:guzzlephp:psr-7:2.4.3
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cpe:2.3:a:guzzlephp:psr-7:2.4.4
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cpe:2.3:a:guzzlephp:psr-7:2.4.5
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cpe:2.3:a:guzzlephp:psr-7:2.5.0
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cpe:2.3:a:guzzlephp:psr-7:2.5.1
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cpe:2.3:a:guzzlephp:psr-7:2.6.0
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cpe:2.3:a:guzzlephp:psr-7:2.6.1
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cpe:2.3:a:guzzlephp:psr-7:2.6.2
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cpe:2.3:a:guzzlephp:psr-7:2.6.3
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cpe:2.3:a:guzzlephp:psr-7:2.7.0
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cpe:2.3:a:guzzlephp:psr-7:2.7.1
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cpe:2.3:a:guzzlephp:psr-7:2.8.0
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cpe:2.3:a:guzzlephp:psr-7:2.8.1
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cpe:2.3:a:guzzlephp:psr-7:2.9.0
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cpe:2.3:a:guzzlephp:psr-7:2.9.1