CVE-2023-39319: Golang Go

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

The html/template package does not apply the proper rules for handling occurrences of "<script", "<!--", and "</script" within JS literals in <script> contexts. This may cause the template parser to improperly consider script contexts to be terminated early, causing actions to be improperly escaped. This could be leveraged to perform an XSS attack.

Affected products

• Golang Go: before 1.20.8 (fixed in 1.20.8); from 1.21.0, before 1.21.1 (fixed in 1.21.1)

Published 2023-09-08. Last modified 2026-06-17.