CVE-2023-3736Network attack vector

Cross-origin data disclosure via Custom Tabs

Published Aug 1, 2023 · Updated Feb 13, 2025

Inappropriate implementation in Google Chrome Custom Tabs on Android before 115.0.5790.98 allows remote attackers to leak cross-origin data. Public vendor material does not identify the flawed function or the operation that mishandles attacker-controlled page content. Exposure requires a user to open crafted HTML in a Custom Tab; the documented consequence is cross-origin data disclosure only.

CVSS severity4.3
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inappropriate implementation in Google Chrome Custom Tabs on Android before 115.0.5790.98 allows remote attackers to leak cross-origin data. Public vendor material does not identify the flawed function or the operation that mishandles attacker-controlled page content. Exposure requires a user to open crafted HTML in a Custom Tab; the documented consequence is cross-origin data disclosure only.

The record

CVE
CVE-2023-3736
Published
Aug 1, 2023
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=115.0.5790.98 <115.0.5790.98

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=115.0.5790.98 <115.0.5790.98

Published CVSS scores

4.3UbuntuCVSS: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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1189Drive-by Compromise

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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