World · End Point & Secure Access
Cloudflare One Client Update Fixes Certificate Chain Issue
Source announcement date: 2026-11-10 · Event date: 2026-11-10
Cloudflare announced Cloudflare One Client 2026.4.1391.0 in its Windows, macOS and Linux release notes dated 10 November 2026. All three entries describe a fix for an issue with building trusted certificate chains.
Updated: 10 November 2026. This report was first published on 21 October 2026; the new release announcement has been added to the existing article.
Separate announcements for three operating systems
For each platform, the vendor describes the update as a generally available release on the stable download channel. The brief hotfix notes do not report a CVE number or an attack incident; the stated scope of the fix concerns certificate-chain construction.
Quad Bilişim commentary
The same version number across three platforms does not mean there is one shared installer. Recording the operating system alongside the version in a corporate software inventory helps keep the different packages distinct.
Welding and verification
Cloudflare One Client Windows 2026.4.1391.0 — 10 November 2026
News information was verified from primary source. “Quad Bilişim assessment” sections are editorial interpretation; The description or measured performance of the manufacturer is not a result. It is a visual original and representation.
