Interpretation Conflict Affecting guzzlehttp/psr7 package, versions <2.12.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-GUZZLEHTTPPSR7-17895059
- published8 Jul 2026
- disclosed8 Jul 2026
- creditGrahamCampbell
Introduced: 8 Jul 2026
NewCVE-2026-59882 (opens in a new tab)How to fix?
Upgrade guzzlehttp/psr7 to version 2.12.3 or higher.
Overview
Affected versions of this package are vulnerable to Interpretation Conflict via the assertValidHost function. An attacker can cause security or routing decisions to be made based on a mismatched host by crafting a URI with authority delimiters, embedded ports, or malformed IPv6 brackets.