Incorrect Resource Transfer Between Spheres Affecting excon package, versions <1.5.0
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Test your applications- Snyk IDSNYK-RUBY-EXCON-17394008
- published22 Jun 2026
- disclosed18 Jun 2026
- creditSnailSploit | Kai Aizen
Introduced: 18 Jun 2026
NewCVE-2026-54171 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade excon to version 1.5.0 or higher.
Overview
excon is an is Extended http(s) connections.
Affected versions of this package are vulnerable to Incorrect Resource Transfer Between Spheres via the RedirectFollower class. An attacker can obtain sensitive header information by exploiting improper header redaction when following redirects.