HTTP/1 client connection desynchronization after CONNECT rejection in net/http

• azl3 golang 1.26.7-1 on Azure Linux 3.0

• azl3 golang 1.27.1-1 on Azure Linux 3.0

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 16, 2026 at 11:45 AM UTC
   • Removed affected products: azl3 gcc 13.2.0-7 on Azure Linux 3.0, azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0.
2. Oct 13, 2026 at 10:45 AM UTC
   • Added affected products: azl3 gcc 13.2.0-7 on Azure Linux 3.0, azl3 golang 1.26.7-1 on Azure Linux 3.0, azl3 golang 1.27.1-1 on Azure Linux 3.0.

1. Oct 11, 2026 at 1:52 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Oct 12, 2026 at 10:25 AM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 16, 2026 at 1:51 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

4. Oct 21, 2026 at 1:15 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.