What’s Vulnerable › Vulnerabilities

CVE-2009-4123

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-12 · updated 2026-06-16
• Weakness: CWE-295

Description

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

Affected products

• jruby-openssl: before 0.6 — fixed in 0.6

How to fix

Upgrade to a fixed version: jruby-openssl 0.6. Check the vendor advisory for mitigations.

References

• http://jruby.org/2009/12/07/vulnerability-in-jruby-openssl
• https://github.com/advisories/GHSA-xgv7-pqqh-h2w9
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/jruby-openssl/CVE-2009-4123.yml
• https://web.archive.org/web/20101213091125/http://jruby.org/2009/12/07/vulnerability-in-jruby-openssl
• http://jruby.org/2009/12/07/vulnerability-in-jruby-openssl
• https://github.com/advisories/GHSA-xgv7-pqqh-h2w9
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/jruby-openssl/CVE-2009-4123.yml
• https://web.archive.org/web/20101213091125/http://jruby.org/2009/12/07/vulnerability-in-jruby-openssl

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