Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 9.8 | Critical | 3.0 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.11, the 95th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
Sources
- GitHub Advisory Database: GHSA-mmrq-6999-72v8
- OSV: GHSA-mmrq-6999-72v8
- nvd.nist.gov/vuln/detail/CVE-2018-16395
- github.com/ruby/openssl/commit/f653cfa43f0f20e8c440122ea982382b6228e7f5
- hackerone.com/reports/387250
- www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released
- www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released
- www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released
- www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released
- www.ruby-lang.org/en/news/2018/10/17/openssl-x509-name-equality-check-does-not-work-correctly-cve-2018-16395
- www.oracle.com/security-alerts/cpujan2020.html
- www.debian.org/security/2018/dsa-4332
- web.archive.org/web/20211206015239/https://securitytracker.com/id/1042105
- usn.ubuntu.com/3808-1