CVE-2026-39826: Golang Go

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

If a trusted template author were to write a <script> tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the <script> block.

Affected products

• Golang Go: before 1.25.10 (fixed in 1.25.10); from 1.26.0, before 1.26.3 (fixed in 1.26.3)

Published 2026-05-07. Last modified 2026-06-17.