Critical Rails Active Storage Flaw Enables Arbitrary File Write via ImageMagick

Wed, 04 Nov 2026 18:40:06 +0000

Engineer — Plan: Arbitrary file write by unauthenticated attackers is severe, but no KEV listing, public PoC, or exploitation signals are present. Patch Rails to 8.1.4.1 (Rails 8.1.x) or 8.0.5.2 (Rails 8.0.x) this sprint if your app uses Active Storage with ImageMagick processing.
SOC/IR — Skip
Leader — Skip

Active-Storage on CuraSec