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CVE-2026-5090

Template::Plugin::HTML versions before 3.103 for Perl allows HTML and JavaScript to be injected

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-5090

Published

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 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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-5090

Published

Template-Toolkit

https://cpan.org/modules

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "modules": [
                        "Template::Plugin::HTML"
                    ],
                    "packageName": "Template-Toolkit",
                    "packageURL": "pkg:cpan/Template-Toolkit",
                    "programFiles": [
                        "lib/Template/Plugin/HTML.pm"
                    ],
                    "programRoutines": [
                        {
                            "name": "Template::Plugin::HTML::html_filter"
                        }
                    ],
                    "repo": "https://github.com/abw/Template2",
                    "versions": [
                        {
                            "lessThan": "3.103",
                            "status": "affected",
                            "version": "0",
                            "versionType": "custom"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON