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Rails patches Active Storage image-analysis arbitrary file read and write

2 sources · 2 articlesFirst reported Updated ()
What's new

First merged summary.

Merged summary · x-ai/grok-4.7 · rewritten as coverage arrivesSummaries by Vani AI

Rails 8.0.5.2 and 8.1.4.1 fix Active Storage image analysis that can read and write arbitrary files; exploitation is not reported.

Ruby on Rails Active Storage, before 8.0.5.2 and before 8.1.4.1, can let an attacker read sensitive files and write arbitrary files through image analysis of uploaded images, according to Dark Reading via the ImageMagick integration. The Canadian Centre for Cyber Security advisory AV26-1129, dated November 5 and citing status as of November 4, points administrators to rails releases 8.0.5.2 and 8.1.4.1. The Cyber Centre says the issue is in Active Storage image analysis and urges review and updates. It does not mention exploitation.

Key facts
  • Affected versions are before Rails 8.0.5.2 and before 8.1.4.1.
  • Fixes are published as rails 8.0.5.2 and 8.1.4.1.
  • Issue allows arbitrary file write and sensitive file read.
  • Dark Reading ties the flaw to Active Storage ImageMagick uploads.
  • CCCS advisory AV26-1129 does not mention exploitation.
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Timeline

dated events in the reporting · oldest first
  1. Nov 4, 2026CCCS cites status of the Rails image-analysis issue. · Canadian Centre for Cyber Security
  2. Nov 5, 2026CCCS publishes advisory AV26-1129 and links both fixes. · Canadian Centre for Cyber Security

What each outlet adds

beyond the shared facts
  • Dark ReadingDescribes ImageMagick upload path and possible lateral movement.
  • Canadian Centre for Cyber SecurityNames AV26-1129, affected ranges, and the two fixed releases.
Vendors
Ruby on Rails
Products
Active StorageImageMagick
Organizations
Canadian Centre for Cyber Security

Coverage

oldest first · one row per article · UTC
  1. · 6d ago Dark ReadingFirst report

    Critical Rails Bug Threatens to Derail Vulnerable Servers

    Rails Active Storage ImageMagick integration allows arbitrary file read and write.

  2. · 6d ago Canadian Centre for Cyber Security

    Rails Active Storage before 8.0.5.2 and 8.1.4.1 can read and write files

    The November 5 advisory covers image-analysis file access and points to rails releases 8.0.5.2 and 8.1.4.1.