CVE-2026-59668Network attack vector

Browser script execution via nomTamano parameter

Published Oct 2, 2026 · Updated Oct 2, 2026

Cross-site scripting in Repasat before the April 20260402 patch allows remote authenticated users to execute script in a victim's browser. The /es/companysizebills/store endpoint accepts attacker-controlled nomTamano content that can become browser-executable script; the exact rendering path is undisclosed. Exploitation requires an authenticated account and victim interaction, and the reported code execution is confined to the browser rather than the server.

CVSS severity4.8
Medium
EPSS probability0.23%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Repasat before the April 20260402 patch allows remote authenticated users to execute script in a victim's browser. The /es/companysizebills/store endpoint accepts attacker-controlled nomTamano content that can become browser-executable script; the exact rendering path is undisclosed. Exploitation requires an authenticated account and victim interaction, and the reported code execution is confined to the browser rather than the server.

The record

CVE
CVE-2026-59668
Published
Oct 2, 2026
Updated
Oct 2, 2026
Vendor
Repasat
Product
Repasat
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 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=0 <Abril patch "20260402"

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Repasat · Repasatversion=0 <Abril patch "20260402"

Published CVSS scores

4.8INCIBECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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