CVE-2026-5090
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.
- Score
- CVSS 3.1 6.1 Medium
- Status
- Deferred - 9b29abf9-4ab0-4765-b253-1875cd9b441e
- Published
- 2026-05-19
- Last modified
- 2026-09-19
- Weaknesses
- CWE-79
References
- https://github.com/abw/Template2/issues/327
- https://github.com/cpan-authors/Template2/commit/ca539f49f6ffd1c2b7d9ef4f48f6b88292418734.patch
- https://metacpan.org/release/TODDR/Template-Toolkit-3.103/changes
- http://www.openwall.com/lists/oss-security/2026/05/19/40
