AUGUST 24, 2026
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Case File

CVE-2026-59882

MEDIUM · CVSS 4.2 EPSS 0.19% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

The vulnerability affects the guzzlehttp/psr7 library in PHP, specifically in the Uri::assertValidHost() method, which fails to properly validate URI host components. This can lead to discrepancies between the host returned by Uri::getHost() and the actual URI authority, potentially compromising security or routing decisions. Developers using versions prior to 2.12.3 should prioritize updating to mitigate risks associated with this flaw.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-59882
Severity
MEDIUM
CVSS
4.2
EPSS
0.19%

Original NVD Description

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.

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