CVE-2026-88020Network attack vectorHinoki check available

Cross-site scripting via unencoded routing parameter

Published Sep 22, 2026 · Updated Sep 22, 2026

Cross-site scripting in Autonomy Logic OpenPLC Runtime 3 allows remote attackers to execute script in a user's browser via a query parameter. The web interface inserts the program-routing query parameter into generated HTML without encoding, causing markup and script to be interpreted rather than treated as text. Exploitation is unauthenticated but requires a user to open the crafted route; successful script runs in that user's OpenPLC web session.

CVSS severity6.1
Medium
EPSS probability0.27%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cross-site scripting in Autonomy Logic OpenPLC Runtime 3 allows remote attackers to execute script in a user's browser via a query parameter. The web interface inserts the program-routing query parameter into generated HTML without encoding, causing markup and script to be interpreted rather than treated as text. Exploitation is unauthenticated but requires a user to open the crafted route; successful script runs in that user's OpenPLC web session.

The record

CVE
CVE-2026-88020
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Autonomy Logic
Product
OpenPLC Runtime
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Autonomy Logic · OpenPLC Runtimeversion=3

Published CVSS scores

6.1CISACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3CISACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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