What is CVE-2026-54171?

CVE-2026-54171 is a medium-severity vulnerability in Excon, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.5/10. Published 2026-07-17.

How severe is CVE-2026-54171?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Excon

CVE-2026-54171

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 ca…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Excon — versions < 1.5.0

Weakness classification (CWE)

CWE-201 — Insertion of Sensitive Information into Sent Data

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54171?: CVE-2026-54171 is a medium-severity vulnerability in Excon, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.5/10. Published 2026-07-17.
How severe is CVE-2026-54171?: Medium severity. CVSS v3 base score is 6.5 out of 10.