CVE-2026-66066

notes

KindaRails2Shell threatens Ruby on Rails apps (CVE-2026-66066)

1. Executive summary CVE-2026-66066 (CVSS 9.5 CRITICAL, EPSS 2%, not in CISA KEV) is an insecure default initialization vulnerability (CWE-1188) in Ruby

03 Aug 2026 · 6 min read read →

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KindaRails2Shell: CVE-2026-66066, Critical Arbitrary File Read and Possible Remote Code Execution in Ruby on Rails

1. Executive summary CVE-2026-66066 is a critical (CVSS 9.5) insecure default initialization vulnerability (CWE-1188) in Ruby on Rails Active Storage, exploitable when

31 Jul 2026 · 4 min read read →

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