CVE-2026-4453Network attack vector

Cross-origin data disclosure via Dawn integer overflow

Published Mar 20, 2026 · Updated Mar 20, 2026

Integer overflow in Dawn in Google Chrome before 146.0.7680.153 on macOS allows remote attackers to leak cross-origin data via crafted HTML. Google has not disclosed the arithmetic locus or incorrect size calculation, and the linked issue remains access-restricted. A user must open the crafted page; the reported consequence is cross-origin data disclosure without integrity or availability impact.

CVSS severity4.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Dawn in Google Chrome before 146.0.7680.153 on macOS allows remote attackers to leak cross-origin data via crafted HTML. Google has not disclosed the arithmetic locus or incorrect size calculation, and the linked issue remains access-restricted. A user must open the crafted page; the reported consequence is cross-origin data disclosure without integrity or availability impact.

The record

CVE
CVE-2026-4453
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-472, CWE-190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 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=146.0.7680.153 <146.0.7680.153

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=146.0.7680.153 <146.0.7680.153

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.

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

CWE-472External Control of Assumed-Immutable Web Parameter
CWE-190Integer Overflow or Wraparound

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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