Improper Neutralization of Special Elements Used in a Template Engine Affecting std/html/template package, versions <1.19.9>=1.20.0-0 <1.20.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-STDHTMLTEMPLATE-14548481
- published6 Jan 2026
- disclosed5 May 2023
- creditJuho Nurminen
Introduced: 5 May 2023
CVE-2023-29400 (opens in a new tab)How to fix?
Upgrade std/html/template to version 1.19.9, 1.20.4 or higher.
Overview
std/html/template is a Go standard library package std/html/template
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements Used in a Template Engine.
Go Vulnerability Report:
Templates containing actions in unquoted HTML attributes (e.g. "attr={{.}}") executed with empty input can result in output with unexpected results when parsed due to HTML normalization rules. This may allow injection of arbitrary attributes into tags.