# CVE-2026-54171: Excon: redact additional sensitive/risky headers when following redirects

CVE-2026-54171 is fixed in ruby-excon on 1 platform by DEBIAN-CVE-2026-54171 (version 1.5.0-1), released July 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-54171
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 17, 2026
- Weakness: Insertion of Sensitive Information Into Sent Data
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ruby-excon Debian 14 | 1.5.0-1 | [DEBIAN-CVE-2026-54171](https://patchblox.com/security/data/fix/linux/debian-cve-2026-54171.md) | Jul 18, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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