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Message-ID: <1c60707b-0721-46ed-851d-2a5fbdf2134c@cpansec.org>
Date: Tue, 8 Sep 2026 21:13:39 +0100
From: Robert Rothenberg <rrwo@...nsec.org>
To: cve-announce@...urity.metacpan.org, oss-security@...ts.openwall.com
Subject: CVE-2026-85485: HTML::FormHandler versions before 0.410002 for Perl
render some error messages into HTML without escaping
========================================================================
CVE-2026-85485 CPAN Security Group
========================================================================
CVE ID: CVE-2026-85485
Distribution: HTML-FormHandler
Versions: before 0.410002
MetaCPAN: https://metacpan.org/dist/HTML-FormHandler
VCS Repo: https://github.com/gshank/html-formhandler
HTML::FormHandler versions before 0.410002 for Perl render some error
messages into HTML without escaping
Description
-----------
HTML::FormHandler versions before 0.410002 for Perl render some error
messages into HTML without escaping.
The Table form layout and the Bootstrap 2 and 3 wrappers splice each
error string straight into the surrounding markup. Version 0.410000,
the fix for CVE-2026-19872, escaped the equivalent values in the other
layouts and wrappers, and 0.410002 extended that to these three.
Error messages that contain attacker-influenced content such as
rejected field values could embed JavaScript in rendered pages.
Problem types
-------------
- CWE-79 Improper Neutralization of Input During Web Page Generation
('Cross-site Scripting')
Solutions
---------
Upgrade to HTML-FormHandler 0.410002 or later.
References
----------
https://metacpan.org/release/ABRAXXA/HTML-FormHandler-0.410002/changes
https://github.com/gshank/html-formhandler/commit/2ea9e138dbfe231e317c13936abe6583217c807f.patch
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