CVE-2009-4123

HIGHCVSS 7.5

7.5

The jruby-openssl gem before 0.6 for JRuby mishandles SSL certificate validation.

CVSS v3: 7.5
EG Score: —
EPSS: —
KEV: Not listed

Published

December 12, 2023

Last Modified

November 21, 2024

References (8)

cve@mitrehttp://jruby.org/2009/12/07/vulnerability-in-jruby-openssl
cve@mitrehttps://github.com/advisories/GHSA-xgv7-pqqh-h2w9
cve@mitrehttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/jruby-openssl/CVE-2009-4123.yml
cve@mitrehttps://web.archive.org/web/20101213091125/http://jruby.org/2009/12/07/vulnerability-in-jruby-openssl
af854a3a-2127-422b-91ae-364da2661108http://jruby.org/2009/12/07/vulnerability-in-jruby-openssl
af854a3a-2127-422b-91ae-364da2661108https://github.com/advisories/GHSA-xgv7-pqqh-h2w9
af854a3a-2127-422b-91ae-364da2661108https://github.com/rubysec/ruby-advisory-db/blob/master/gems/jruby-openssl/CVE-2009-4123.yml
af854a3a-2127-422b-91ae-364da2661108https://web.archive.org/web/20101213091125/http://jruby.org/2009/12/07/vulnerability-in-jruby-openssl

Affected Packages

(1 across 1 ecosystem)

RubyGems(1)

Package	Vulnerable range	Fixed in	Dependents
jruby-openssl	0.0.1 ... 0.5.2 (15 versions)	0.6	—

Weakness Classification(1)

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

CWE-295Improper Certificate Validation

Data Freshness Timeline

(refreshed 8× in last 7d / 8× 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.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:43 UTCepss_batch
2026-05-24 12:19 UTCEG score recompute

Frequently asked(4)

What is CVE-2009-4123?

CVE-2009-4123 is a high vulnerability published on December 12, 2023. The jruby-openssl gem before 0.6 for JRuby mishandles SSL certificate validation.

When was CVE-2009-4123 disclosed?

CVE-2009-4123 was first published in the National Vulnerability Database on December 12, 2023, 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.

What is the CVSS score of CVE-2009-4123?

CVE-2009-4123 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2009-4123?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-4123, 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

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