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Servers and applications

CVE-2026-117553

Umbraco CMS before 17.7.2 and 18.2.2 Account Takeover via Host Header Poisoning

Severity
High 7.7
Published
27 Oct 2026
Last changed
27 Oct 2026
Added to UpHeron
3 Nov 2026
Fixed in
17.7.2, 18.2.2
Sources
CVE Program

Affected software

SoftwareAffected versions
Umbraco CMSServers and applications · cna:umbraco|umbraco-cms
  • Every version before 17.7.2
  • From 18.0.0 before 18.2.2

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-117553