CVE-2026-54171
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductExcon
PublishedJul 17, 2026
First seenJul 17, 2026
Weakness typeCWE-201CWE-201
How to fix
Update
- excon_project excon1.5.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| excon_project excon | v < 1.5.0 | 1.5.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.