Unknown severity · Source severity not reportedCVE-2026-78190

WebDyne versions from 2.014 before 3.022 for Perl reflect request parameters unescaped into form field values, allowing cross-site scriptingCVE-2026-78190

Answer in brief

CVE-2026-78190 records a Unknown severity vulnerability in WebDyne versions from 2.014 before 3.022 for Perl reflect request parameters unescaped into form field values, allowing cross-site scripting. The current sources do not mark it as known exploited. The current feed maps WebDyne (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 31, 2026Updated Oct 31, 2026Source checked Oct 31, 2026First seen by HOL Oct 31, 2026Material review Oct 31, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps WebDyne (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
WebDynegeneric	>=2.014 <3.022	3.022

Recommended response

Check inventory. Check lockfiles and deployed manifests for WebDyne.
Review the reported fix. Source-reported solution: Upgrade to WebDyne 3.022 or later.

Evidence timeline and material changes

Published upstream
Oct 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 31, 2026

Sources and claim methodology

Source referencemetacpan.org

Upstream source description

WebDyne versions from 2.014 before 3.022 for Perl reflect request parameters unescaped into form field values, allowing cross-site scripting. The textfield, password_field and filefield tags fill their value attribute from the request parameter of the same name. WEBDYNE_CGI_AUTOESCAPE, which controls escaping of these values, defaults to off. From 2.022, WebDyne::HTML::Tiny also replaced its entity_encode method with one that returns its input unchanged, so enabling WEBDYNE_CGI_AUTOESCAPE has no effect. A remote attacker can inject script into any page using these tags through a crafted link.

Quoted source text, attributed separately from HOL analysis.