CVE-2020-14359

HIGHNVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2022-02-09. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.3Exploit: NoneExposed: 0

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

A vulnerability was found in all versions of Keycloak Gatekeeper, where on using lower case HTTP headers (via cURL) an attacker can bypass our Gatekeeper. Lower case headers are also accepted by some webservers (e.g. Jetty). This means there is no protection when we put a Gatekeeper in front of a Jetty server and use lowercase headers.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
—
EPSS
56.9%
KEV
Not listed

Published

February 23, 2021

Last Modified

November 21, 2024

References (4)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/keycloak/keycloak-gatekeeper—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/keycloak/keycloak-gatekeeper———

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 42× 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. 2026-07-22 22:34 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
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  1. 2026-07-04 06:28 UTCEPSS rescore
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  66. 2026-05-26 20:32 UTCEG score recompute
  67. 2026-05-26 20:32 UTCGHSA enrichment
  68. 2026-05-26 13:42 UTCEPSS rescore
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  72. 2026-05-24 08:21 UTCOSV refresh

Frequently asked(5)

What is CVE-2020-14359?
CVE-2020-14359 is a high vulnerability published on February 23, 2021. A vulnerability was found in all versions of Keycloak Gatekeeper, where on using lower case HTTP headers (via cURL) an attacker can bypass our Gatekeeper. Lower case headers are also accepted by some webservers (e.g. Jetty). This means there is no protection when we put a Gatekeeper in front of a…
When was CVE-2020-14359 disclosed?
CVE-2020-14359 was first published in the National Vulnerability Database on February 23, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-14359 actively exploited?
CVE-2020-14359 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-14359?
CVE-2020-14359 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2020-14359?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-14359, 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.

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