Origin Validation Error Affecting guzzlehttp/guzzle package, versions <7.12.3
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-GUZZLEHTTPGUZZLE-17895058
- published8 Jul 2026
- disclosed8 Jul 2026
- creditGrahamCampbell
Introduced: 8 Jul 2026
CVE-2026-59883 (opens in a new tab)How to fix?
Upgrade guzzlehttp/guzzle to version 7.12.3 or higher.
Overview
Affected versions of this package are vulnerable to Origin Validation Error via the CookieJar process. An attacker can access or manipulate cookies belonging to other hosts by exploiting improper domain matching for IP-address or bare-numeric domains.