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cve record

CVE-2026-66066

CVSS—
Severitynone
Weakness—
ExploitedNot in CISA KEV

Description

References

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Our coverage of CVE-2026-66066

CVE-2026-66066critical

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

A critical security vulnerability (CVE-2026-66066) in Ruby on Rails (aka Rails), one of the most widely used frameworks for building websites and web apps, may allow attackers to read sensitive files off a server and, in some cases, take full control of it. Nicknamed “KindaRails2Shell” by the researchers who found it, the flaw lets an attacker sneak a booby-trapped file past a website’s image-uplo