Improper Neutralization of Input During Web Page Generation in OpenPLC Runtime v3 (CVE-2026-88020) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-88020

Improper Neutralization of Input During Web Page Generation in OpenPLC Runtime v3

Answer in brief

CVE-2026-88020 records a Medium severity (CVSS 5.3) vulnerability in Improper Neutralization of Input During Web Page Generation in OpenPLC Runtime v3. The current sources do not mark it as known exploited. The current feed maps Autonomy Logic/OpenPLC Runtime (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 Sep 22, 2026Updated Sep 22, 2026Source checked Sep 22, 2026First seen by HOL Sep 22, 2026Material review Sep 22, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.3. 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 Autonomy Logic/OpenPLC Runtime (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Autonomy Logic/OpenPLC Runtimegeneric	3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Autonomy Logic/OpenPLC Runtime.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 22, 2026

Sources and claim methodology

Upstream source description

Autonomy Logic OpenPLC 3 is susceptible to an improper neutralization of input during web page generation vulnerability when the web interface attempts to route the program based on a query string parameter with no encoding.

Quoted source text, attributed separately from HOL analysis.