Is CVE-2026-54171 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-54171?

CVE-2026-54171 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-54171

Description

Excon is usable, fast, simple HTTP 1.1 for Ruby. Prior to 1.5.0, Excon's RedirectFollower middleware failed to strip additional sensitive headers when following redirects and did not provide a custom list of headers to strip. This could cause inadvertent leakage of sensitive data when the initial request includes header information that is not intended for the new target. This issue is fixed in version 1.5.0.