CVE-2026-54171
This could cause inadvertent leakage of sensitive data when the initial request includes header information that is not intended for the new target.
Does this matter?
Lower severity and a low EPSS score (0.43%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 0.43% probability · 36th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-201
- Affected
- excon project/excon
- Source
- security-advisories@github.com
References
- https://github.com/excon/excon/commit/ea89a35308a12f4b791b6c50f2cbd33f94889fa3Patch
- https://github.com/excon/excon/pull/901Issue Tracking, Patch
- https://github.com/excon/excon/security/advisories/GHSA-48rx-c7pg-q66rPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.