CVE-2026-4679Network attack vector

Out-of-bounds write via font integer overflow

Published Mar 24, 2026 · Updated Mar 24, 2026

Integer overflow in Google Chrome Fonts before 146.0.7680.165 allows remote attackers to write outside memory bounds via crafted HTML. Chrome has not disclosed the affected font-processing routine or the arithmetic operation that overflows; the restricted bug record prevents a more specific mechanism description. A victim must load attacker-controlled HTML, after which the out-of-bounds write can corrupt the browser process; published sources do not establish code execution.

CVSS severity8.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Integer overflow in Google Chrome Fonts before 146.0.7680.165 allows remote attackers to write outside memory bounds via crafted HTML. Chrome has not disclosed the affected font-processing routine or the arithmetic operation that overflows; the restricted bug record prevents a more specific mechanism description. A victim must load attacker-controlled HTML, after which the out-of-bounds write can corrupt the browser process; published sources do not establish code execution.

The record

CVE
CVE-2026-4679
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-190, CWE-472, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=146.0.7680.165 <146.0.7680.165

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=146.0.7680.165 <146.0.7680.165

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CWE-472External Control of Assumed-Immutable Web Parameter
T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo