PatchTheCVEconcurrent ruby vulnerabilities and fixes
Recent CVEs affecting concurrent ruby, with upgrade or downgrade steps. 3 tracked.
Also searched as: concurrentruby.
concurrent ruby has 3 tracked vulnerabilities, 1 critical. A fixed release or vendor patch exists for 3. Most recent: 2026-06-24. Highest priority: CVE-2026-54904 (score 49/100).
- CVE-2026-54904 HIGH 7.5 UPGRADE concurrent-ruby is a modern concurrency tools for Ruby
- CVE-2026-54906 CRITICAL 9.8 UPGRADE concurrent-ruby is a modern concurrency tools for Ruby
- CVE-2026-54905 MEDIUM 5.5 UPGRADE concurrent-ruby is a modern concurrency tools for Ruby
FAQ
How do I fix concurrent ruby vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is concurrent ruby being exploited right now?
None of the tracked concurrent ruby CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which concurrent ruby CVE should I patch first?
CVE-2026-54904 currently ranks highest (49/100): concurrent-ruby is a modern concurrency tools for Ruby.