Bug 2498161 (CVE-2026-59882) - CVE-2026-59882 guzzlehttp/psr7: guzzlehttp/psr7: URI host validation flaw can lead to security bypass or misrouting
Summary: CVE-2026-59882 guzzlehttp/psr7: guzzlehttp/psr7: URI host validation flaw can...
Keywords:
Status: NEW
Alias: CVE-2026-59882
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2499191 2499192 2499193 2499194
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-08 17:02 UTC by OSIDB Bzimport
Modified: 2026-07-10 20:41 UTC (History)
0 users

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Description OSIDB Bzimport 2026-07-08 17:02:50 UTC 
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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