CVE-2014-6438

HIGHNVD 7.57.5—

7.5

The URI.decode_www_form_component method in Ruby before 1.9.2-p330 allows remote attackers to cause a denial of service (catastrophic regular expression backtracking, resource consumption, or application crash) via a crafted string.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 78.7%
KEV: Not listed

Published

September 6, 2017

Last Modified

May 13, 2026

References (8)

cve@mitrehttp://www.openwall.com/lists/oss-security/2015/07/13/6
cve@mitrehttp://www.securitytracker.com/id/1032874
cve@mitrehttps://github.com/ruby/www.ruby-lang.org/issues/817
cve@mitrehttps://www.ruby-lang.org/en/news/2014/08/19/ruby-1-9-2-p330-released/
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/07/13/6
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1032874
af854a3a-2127-422b-91ae-364da2661108https://github.com/ruby/www.ruby-lang.org/issues/817
af854a3a-2127-422b-91ae-364da2661108https://www.ruby-lang.org/en/news/2014/08/19/ruby-1-9-2-p330-released/

Vendor Advisories for CVE-2014-6438(3)

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

Patch Availability(3)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	ruby4-0-main-4.0.0-33.3.hum1	2026-04-17	redhat
redhat	ruby3-3-main-3.3.10-23.1.hum1	2026-04-09	redhat
redhat	ruby3-4-main-3.4.8-31.1.hum1	2026-04-09	redhat

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.

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:44 UTCepss_batch
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2026-05-26 13:41 UTCepss_batch

Frequently asked(5)

What is CVE-2014-6438?

CVE-2014-6438 is a high vulnerability published on September 6, 2017. The URI.decodewwwform_component method in Ruby before 1.9.2-p330 allows remote attackers to cause a denial of service (catastrophic regular expression backtracking, resource consumption, or application crash) via a crafted string.

When was CVE-2014-6438 disclosed?

CVE-2014-6438 was first published in the National Vulnerability Database on September 6, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2014-6438 actively exploited?

CVE-2014-6438 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2014-6438?

CVE-2014-6438 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2014-6438?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2014-6438, 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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CVE-2014-6438

📅 Published

🔄 Last Modified

🔗 References (8)

📣 Vendor Advisories for CVE-2014-6438(3)