CRITICALRubyGems →
Active Storage has possible arbitrary file read and remote code execution in Active Storage variant processing
Active Storage has possible arbitrary file read and remote code execution in Active Storage variant processing
Affected packages
- activestorage— before 7.2.3.2
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- 1.70%
- EPSS percentile
- 75.0%
- GitHub stars
- 58,669
- OpenSSF scorecard
- 6.3 / 10
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 75%.
Sources
- https://github.com/rails/rails/security/advisories/GHSA-xr9x-r78c-5hrm
- https://github.com/rails/rails/commit/1c01bb587206ee6eb0e1179c2cef96a6a47acb1e
- https://github.com/rails/rails/commit/349e7a5d5b4b715af1e416db824f3c078a7d59e5
- https://github.com/rails/rails/commit/d79b7f4aa17dec8ce4960fef05733c8c0c7ef49a
- https://github.com/rails/rails
- https://github.com/rails/rails/releases/tag/v7.2.3.2
- https://github.com/rails/rails/releases/tag/v8.0.5.1
- https://github.com/rails/rails/releases/tag/v8.1.3.1
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-66066.yml
- https://thehackernews.com/2026/07/critical-rails-flaw-could-let.html
- https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-66066
Structured record: https://osv.dev/vulnerability/GHSA-xr9x-r78c-5hrm
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