CVE-2026-17903

Privileged-page content injection via malicious network traffic

Published Jul 30, 2026 · Updated Jul 30, 2026

Cross-site scripting in Chromecast in Google Chrome before 151.0.7922.72 allows attackers to inject content via malicious network traffic. Google identifies insufficient policy enforcement in Chromecast, but the restricted issue does not disclose which privileged page accepts untrusted scripts or HTML. Reachability requires access to the local network segment; successful injection changes privileged-page content, with no reported service interruption.

CVSS severity5.4
Medium
EPSS probability0.12%
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 Chromecast in Google Chrome before 151.0.7922.72 allows attackers to inject content via malicious network traffic. Google identifies insufficient policy enforcement in Chromecast, but the restricted issue does not disclose which privileged page accepts untrusted scripts or HTML. Reachability requires access to the local network segment; successful injection changes privileged-page content, with no reported service interruption.

The record

CVE
CVE-2026-17903
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-79
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 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=151.0.7922.72 <151.0.7922.72

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=151.0.7922.72 <151.0.7922.72

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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