CVE-2026-93379Network attack vectorHinoki check available

Site-isolation bypass via faulty ORB authorization

Published Sep 17, 2026 · Updated Sep 17, 2026

Incorrect authorization in ORB in Google Chrome before 153.0.8010.52 allows remote attackers to bypass site isolation via crafted HTML. Google identifies ORB as the affected component but has not disclosed the failing authorization check or code path. A user must open the crafted page; the documented impact is limited to the browser isolation boundary, with no reported code execution.

CVSS severity4.3
Medium
EPSS probability0.25%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect authorization in ORB in Google Chrome before 153.0.8010.52 allows remote attackers to bypass site isolation via crafted HTML. Google identifies ORB as the affected component but has not disclosed the failing authorization check or code path. A user must open the crafted page; the documented impact is limited to the browser isolation boundary, with no reported code execution.

The record

CVE
CVE-2026-93379
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
WebM Project
Product
Chrome
Classifications
CWE-863
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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 version<153.0.8010.52

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WebM Project · Chrome<153.0.8010.52

Published CVSS scores

4.3CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization

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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