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Roundcube

v1.6.19

Security Fix Security Release Released September 13, 2026

Security update fixing 12 vulnerabilities including stored XSS and SSRF filter bypass.

Bug Fix

1
  • Various regression fixes accumulated across the 1.6.16-1.6.19 patch releases.

Security Fixes

6
  • Fixed multiple zero-click stored XSS vulnerabilities in message rendering.
  • Fixed SSRF protection bypass allowing requests to internal network resources.
  • Fixed email header injection vulnerability.
  • Fixed cross-user contact access vulnerability.
  • Fixed XSS via crafted TNEF attachment content.
  • Fixed SVG SMIL animation filter bypass allowing script execution.
See the Demo