Cross-site scripting in HTML-FormHandler
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
HTML::FormHandler versions before 0.410002 for Perl render field attributes into HTML without escaping using the process_attrs method. Any application with fields or field labels where some attributes are built from data rather than literals allows attacker-influenced text in an attribute value that can override the field attributes or embed JavaScript in rendered pages. For example, the RadioGroup widget uses the process_attrs method via the render_option and wrap_radio methods.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | HTML-FormHandler | before 0.410002 | 0.410002 | Patch available | CNA |
- HTML-FormHandler Vendor— Affected before 0.410002 Fixed in 0.410002 Patch available CNA
Remediation
- Fix · CNA HTML-FormHandler Fixed in 0.410002
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-85630
- 2026-10-03 Alias added: GHSA-4qf4-6x5x-m29p
References
Sources
- CVE-2026-85630 · CVE Program
- CVE-2026-85630 · NVD
- FIRST EPSS
- GHSA-4qf4-6x5x-m29p · GitHub Advisory Database · CC BY 4.0
- CVE-2026-85630 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences