PatchTheCVEmessagepack vulnerabilities and fixes
Recent CVEs affecting messagepack, with upgrade or downgrade steps. 1 tracked.
messagepack has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-07-30. Highest priority: CVE-2026-54522 (score 27/100).
- CVE-2026-54522 MEDIUM 5.4 UPGRADE MessagePack for Ruby is an implementation of the MessagePack binary serialization format
FAQ
How do I fix messagepack 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 messagepack being exploited right now?
None of the tracked messagepack CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which messagepack CVE should I patch first?
CVE-2026-54522 currently ranks highest (27/100): MessagePack for Ruby is an implementation of the MessagePack binary serialization format.