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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libtemplate-perl: CVE-2026-5090
Message-ID: <177926074537.1337001.3035823754046392532.reportbug@elende.valinor.li>
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Date: Wed, 20 May 2026 09:05:45 +0200
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Source: libtemplate-perl
Version: 3.102-2
Severity: important
Tags: security upstream
Forwarded: https://github.com/abw/Template2/issues/327
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for libtemplate-perl.

CVE-2026-5090[0]:
| 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      <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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-5090
    https://www.cve.org/CVERecord?id=CVE-2026-5090
[1] https://lists.security.metacpan.org/cve-announce/msg/40218729/
[2] https://github.com/abw/Template2/issues/327
[3] https://github.com/cpan-authors/Template2/pull/337
[4] https://github.com/cpan-authors/Template2/commit/11c78a7a771d4af505efeb754a0b8775689c2eae

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
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