Improper Removal of Sensitive Information Before Storage or Transfer Affecting guzzlehttp/guzzle package, versions <7.15.1
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-18306774
- published25 Jul 2026
- disclosed20 Jul 2026
- creditUnknown
Introduced: 20 Jul 2026
CVE-2026-67354 (opens in a new tab)How to fix?
Upgrade guzzlehttp/guzzle to version 7.15.1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Removal of Sensitive Information Before Storage or Transfer via the RedirectMiddleware process. An attacker can access sensitive information included in URI fragments by controlling the redirect destination and inspecting the Referer header sent during a same-scheme redirect. This is only exploitable if the allow_redirects.referer option is enabled, a request is made to a URI containing a sensitive fragment, and a same-scheme redirect is followed to a less-trusted destination.
Workaround
This vulnerability can be mitigated by disabling automatic Referer generation (it is off by default), explicitly setting the referer option to false in redirect options, disabling automatic redirects and following trusted destinations manually, or removing the fragment from the request URI before sending requests that may redirect.