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

Quick assessment

Affected
excon excon
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

excon excon是excon社区的一款HTTP客户端库。 excon 1.5.0之前版本存在信息泄露漏洞，该漏洞源于RedirectFollower中间件在重定向时未能删除额外的敏感标头，并且没有提供自定义标头列表进行过滤，可能导致在初始请求包含不适用于新目标标头信息时意外泄露敏感数据。

CVSS 6.5 · Medium EPSS 0.30% · P23

Affected Version Matrix 1

VendorProduct Version RangeStatus
excon excon < 1.5.0 affected
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I. Basic Information for CVE-2026-54171

Vulnerability Information
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Vulnerability Title
Excon: redact additional sensitive/risky headers when following redirects
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过发送数据的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
excon 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
excon excon是excon社区的一款HTTP客户端库。 excon 1.5.0之前版本存在信息泄露漏洞，该漏洞源于RedirectFollower中间件在重定向时未能删除额外的敏感标头，并且没有提供自定义标头列表进行过滤，可能导致在初始请求包含不适用于新目标标头信息时意外泄露敏感数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
excon excon < 1.5.0 -

II. Public POCs for CVE-2026-54171

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III. Intelligence Information for CVE-2026-54171

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Patches & Fixes for CVE-2026-54171 (2)

Vendor Advisories for CVE-2026-54171 (1)

IV. Related Vulnerabilities

Same product: excon
Same vendor: excon
Same weakness: CWE-201

V. Comments for CVE-2026-54171

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