CVE-2026-54171

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:github_m
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Excon does not redact additional sensitive/risky headers when following redirects

Impact

The redirect follower middleware previously failed to strip a number of headers that are known to be sensitive and did not provide a way to provide a custom list of headers to strip.

_What kind of vulnerability is it? Who is impacted?_ This could cause inadvertent leakage of sensitive data for users of the RedirectFollower middleware in cases where the initial request includes header information that is not intended for the new target.

Patches

Patch exists and is released in v1.5.0

Workarounds

Users can backport the fix to a custom redirect follower middleware.

CVSS v3
6.5
EG Score
6.5(low)
EPSS
—
KEV
Not listed

Published

July 10, 2026

Last Modified

July 10, 2026

Vendor Advisories for CVE-2026-54171(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-16 00:20 UTCEG score recompute
  2. 2026-07-14 23:42 UTCEG score recompute
  3. 2026-07-13 23:05 UTCEG score recompute
  4. 2026-07-12 22:27 UTCEG score recompute
  5. 2026-07-11 21:49 UTCEG score recompute
  6. 2026-07-10 21:12 UTCEG score recompute

Frequently asked(4)

What is CVE-2026-54171?
CVE-2026-54171 is a medium vulnerability published on July 10, 2026. Excon does not redact additional sensitive/risky headers when following redirects Impact The redirect follower middleware previously failed to strip a number of headers that are known to be sensitive and did not provide a way to provide a custom list of headers to strip. What kind of vulnerability…
When was CVE-2026-54171 disclosed?
CVE-2026-54171 was first published in the National Vulnerability Database on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-54171?
CVE-2026-54171 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-54171?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54171, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-54171

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