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Fencer Vulns
medium 6.1

CVE-2026-85484 json

HTML::FormHandler versions before 0.410002 for Perl render option group labels and radio button labels into HTML without escaping

published 2026-09-08 2 mo ago modified 2026-09-10 59 d ago also EUVD-2026-74167

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

HTML::FormHandler versions before 0.410002 for Perl render option group labels and radio button labels into HTML without escaping.

The Select, RadioGroup, CheckboxGroup and HorizCheckboxGroup widgets render a group label unescaped, Select into a label attribute and the other three into element content. RadioGroup also renders each radio button's own label unescaped.

Any application whose option list is built from data rather than literals, using options_from, an options_fieldname method, or the DBIC model, allows attacker-influenced text in a label that can override the options or embed JavaScript in rendered pages.

Patch / fix

  • libhtml-formhandler-perl Debian 14 0.410002-1

debian advisories DEBIAN-CVE-2026-85484

  • perl-HTML-FormHandler openSUSE Tumbleweed 0.410.2-1.1

opensuse advisories openSUSE-SU-2026:11745-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-85484 updated cvss 4.6

perl-HTML-FormHandler: HTML::FormHandler: Cross-Site Scripting (XSS) via unescaped HTML labels

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
59 d ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.