CPANSA-Template-Toolkit-2026-5090: Template-Toolkit vulnerability

Publisher giterlizzi Document category csaf_security_advisory
Initial release date 2026-05-19T00:00:00 Engine CSAF Perl Toolkit 0.26
Current release date 2026-05-19T00:00:00 Build Date
Current version 1 Status final
CVSS v3.1 Base Score 6.1 Severity
Original language Language en
Also referred to

Vulnerability Description

Template::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 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.

Vulnerabilities

CVE-2026-5090

Vulnerability Description

Template::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



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.

Weakness CWE-79 : Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Known affected
Product Score
Template-Toolkit less than 3.103
CVSS Version CVSS Vector CVSS Base Score CVSS Base Severity
3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N 6.1 Medium
Fixed

giterlizzi

Namespace: https://github.com/giterlizzi/

gdt@cpan.org

References

Revision history

Version Date of the revision Summary of the revision
1 Tue May 19 00:00:00 2026 First release

Sharing rules

TLP:WHITE
For the TLP version see: https://www.first.org/tlp/