All posts

Critical vulnerability

Critical arbitrary file access in Ruby on Rails (CVE-2026-126082)

Arbitrary file access in Ruby on Rails · Servers and applications

CVE-2026-126082

Active Storage: Possible arbitrary file write and read in Active Storage image analysis

Severity
Critical 9.8
Published
10 Nov 2026
Fixed in
8.0.5.2, 8.1.4.1
SoftwareAffected versions
Ruby on RailsServers and applications
  • From 8.1 before 8.1.4.1
  • Every version before 8.0.5.2
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-126082
Everything about CVE-2026-126082

From NVD, the CVE Program, OSV.dev with the GitHub Advisory Database, WPVulnerability, WordPress's security advisories and CISA's Known Exploited Vulnerabilities catalog, as they stood when this was written. Each vulnerability's own page has its latest rating and fix. This product uses the NVD API but is not endorsed or certified by the NVD.