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CVE-2026-59882

guzzlehttp/psr7: Host Confusion via Weak URI Host Validation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
guzzle / psr7affected < 2.12.3

CWE

CWE-436

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.