Amazon Linux 2023 Security Advisory: ALAS2023-2026-1797
Advisory Released Date: 2026-06-08
Advisory Updated Date: 2026-06-08
Severity:
Medium
Issue Overview:
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. (CVE-2026-5090)
Affected Packages:
perl-Template-Toolkit
Issue Correction:
Run dnf update perl-Template-Toolkit --releasever 2023.12.20260608 or dnf update --advisory ALAS2023-2026-1797 --releasever 2023.12.20260608 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
perl-Template-Toolkit-debuginfo-3.009-3.amzn2023.0.4.aarch64
perl-Template-Toolkit-debugsource-3.009-3.amzn2023.0.4.aarch64
perl-Template-Toolkit-3.009-3.amzn2023.0.4.aarch64
src:
perl-Template-Toolkit-3.009-3.amzn2023.0.4.src
x86_64:
perl-Template-Toolkit-debugsource-3.009-3.amzn2023.0.4.x86_64
perl-Template-Toolkit-debuginfo-3.009-3.amzn2023.0.4.x86_64
perl-Template-Toolkit-3.009-3.amzn2023.0.4.x86_64