Unknown severity · Source severity not reportedCVE-2026-78191

WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pagesCVE-2026-78191

Answer in brief

CVE-2026-78191 records a Unknown severity vulnerability in WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages. 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	>=2.031 <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 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages. WebDyne decides whether to run a requested file as a page by matching its name against WEBDYNE_PSP_EXT_RE, which has no end anchor. An application that accepts uploads by checking only the final extension lets a remote attacker upload a file such as report.psp.pdf and run its embedded Perl by requesting it.

Quoted source text, attributed separately from HOL analysis.