CVE-2026-79363Network attack vectorHinoki check available

Browser script execution via unsanitized branding footer

Published Oct 9, 2026 · Updated Oct 9, 2026

Stored XSS in Cloudron 9.1.7 and 9.2 allows remote authenticated users to execute JavaScript via the Branding Footer setting. The stored footer HTML retains JavaScript event handlers because it is rendered without sufficient sanitization on the public login/OpenID interaction page and in the System Event Log. Planting the payload requires administrator access, and execution occurs in the Cloudron web origin when an affected page is viewed, rather than directly on the server.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Stored XSS in Cloudron 9.1.7 and 9.2 allows remote authenticated users to execute JavaScript via the Branding Footer setting. The stored footer HTML retains JavaScript event handlers because it is rendered without sufficient sanitization on the public login/OpenID interaction page and in the System Event Log. Planting the payload requires administrator access, and execution occurs in the Cloudron web origin when an affected page is viewed, rather than directly on the server.

The record

CVE
CVE-2026-79363
Published
Oct 9, 2026
Updated
Oct 9, 2026
Vendor
Cloudron
Product
Cloudron
Classifications
T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Cloudron · Cloudronversion=n/a

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started