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Servers and applications

CVE-2026-126075

Active Support: Possible XSS vulnerability in Active Support MessagePack serializer

Severity
Medium 4.7
Published
10 Nov 2026
Last changed
10 Nov 2026
Added to UpHeron
10 Nov 2026
Fixed in
8.1.4.1
Sources
CVE Program

Affected software

SoftwareAffected versions
Ruby on RailsServers and applications · cna:rails|rails
  • From 8.1 before 8.1.4.1

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-126075