CVE-2026-54498Public exploitNetwork attack vector

Cross-site scripting via unescaped around_render output

Published Jul 17, 2026 · Updated Jul 17, 2026

Cross-site scripting in ViewComponent 4.0.0 through 4.11.0 allows remote authenticated users to execute script in another user's browser. ViewComponent::Base#around_render returns replacement strings without the HTML escaping applied to normal #call output, while collection rendering joins results and marks the aggregate html_safe. Exploitation requires an application override that returns attacker-influenced unsafe content in a browser-visible response and victim interaction; successful script execution can read page data or issue same-origin actions.

CVSS severity8.7
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in ViewComponent 4.0.0 through 4.11.0 allows remote authenticated users to execute script in another user's browser. ViewComponent::Base#around_render returns replacement strings without the HTML escaping applied to normal #call output, while collection rendering joins results and marks the aggregate html_safe. Exploitation requires an application override that returns attacker-influenced unsafe content in a browser-visible response and victim interaction; successful script execution can read page data or issue same-origin actions.

The record

CVE
CVE-2026-54498
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
ViewComponent
Product
ViewComponent
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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=>= 4.0.0, < 4.12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ViewComponent · ViewComponentversion=>= 4.0.0, < 4.12.0

Published CVSS scores

8.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A: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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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

Technologies

Your stack

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Your stack

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