CVE-2026-59882Medium· 4.2▾ Sunlitguzzlehttp/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:…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 23.1 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 17.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
0.2% → 0.3%
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.
psr-7 < 2.12.3Upgrade past the affected range:
psr-7 2.12.3Connected by shared product, vendor, weakness, or advisory.
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