CVE-2026-76019Network attack vector

Origin-policy bypass via Worker authorization

Published Aug 20, 2026 · Updated Aug 20, 2026

Authorization bypass in Workers in Google Chrome before 151.0.7922.173 lets attackers bypass web origin policy via crafted HTML. Public records identify the locus as the Workers implementation, but Google has not disclosed which worker-side origin or authorization check incorrectly trusts untrusted renderer-controlled state. Exploitation requires prior compromise of the renderer process and user interaction with a crafted page, so the flaw is a post-compromise same-origin-policy bypass rather than a standalone code-execution bug.

CVSS severityUnavailable
Unscored
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Workers in Google Chrome before 151.0.7922.173 lets attackers bypass web origin policy via crafted HTML. Public records identify the locus as the Workers implementation, but Google has not disclosed which worker-side origin or authorization check incorrectly trusts untrusted renderer-controlled state. Exploitation requires prior compromise of the renderer process and user interaction with a crafted page, so the flaw is a post-compromise same-origin-policy bypass rather than a standalone code-execution bug.

The record

CVE
CVE-2026-76019
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-863
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=151.0.7922.173 <151.0.7922.173

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Go standard library · Google Chromeversion=151.0.7922.173 <151.0.7922.173

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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization

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

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Your stack

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