VulnerabilityBleeping Computer
9.5 — CRITICAL
Rails patches critical Active Storage flaw with RCE potential
A critical vulnerability in the Active Storage framework can allow an unauthenticated attacker to read arbitrary files from a Rails application, and potentially escalate to remote code execution (RCE). [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A critical vulnerability in the Active Storage framework allows an unauthenticated attacker to read arbitrary files and potentially escalate to remote code execution (RCE), impacting systems using libvips before version 8.13.
⚙️Technical Details
CVEs
CVE-2026-66066
Affected Systems
Rails applications using Active Storage with libvips before 8.13
Attack Vectors
Image upload vulnerability, exploiting libvips operations marked unsafe for untrusted content
💥Impact Assessment
Severity: critical
Who Is at Risk
Systems running Rails applications with Active Storage and libvips before version 8.13
🛡️Recommended Actions
1Upgrade to libvips 8.13 or later
2Rotate the 'secret_key_base' (the Rails master key) and other sensitive credentials
3Disable vulnerable functionality by setting the VIPS_BLOCK_UNTRUSTED environment variable
📦Affected Products
Rails applications using Active Storage with libvips
🔐NVD Verified DataVERIFIED
Weaknesses
CWE-1188
Read the full article
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