Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-5090: emplate::Plugin::HTML versions through 3.102 for Perl allows HTML and JavaScript to be injected. The html_filter function did not escape single quotes. HTML attributes inside of single quotes could be have code injected. For example, the variable "var" in <a id='ref' title='[% var | html %]'> would not be properly escaped. An attacker could insert some limited HTML and JavaScript, for example, var = " ' onclick='while (true) { alert(1) }'" Note that arbitrary HTML and JavaScript would be difficult to inject, because angle brackets, ampersands and double-quotes would still be escaped.
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | perl-Template-Toolkit | 0:2.24-5.amzn2.0.3 |
| Amazon Linux · 2 | perl-Template-Toolkit-debuginfo | 0:2.24-5.amzn2.0.3 |
Vulnerabilities 1
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Medium 6.1
Template::Plugin::HTML versions before 3.103 for Perl allows HTML and JavaScript to be injected
Template::Plugin::HTML versions before 3.103 for Perl allows HTML and JavaScript to be injected. The html_filter function did not escape single quotes. HTML attributes inside of single quotes could be have code injected. For example, the variable "var" in <a …
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-5090.html