CVE-2026-3544Network attack vector

Out-of-bounds write via WebCodecs heap overflow

Published Mar 4, 2026 · Updated Mar 4, 2026

Heap buffer overflow in WebCodecs in Google Chrome before 145.0.7632.159 allows remote attackers to write out of bounds via crafted HTML. The restricted Chromium issue does not disclose which WebCodecs operation miscalculates or fails to validate the heap-buffer boundary. A user must open the page; the published record confirms memory corruption but does not establish sandbox escape or code execution.

CVSS severity8.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in WebCodecs in Google Chrome before 145.0.7632.159 allows remote attackers to write out of bounds via crafted HTML. The restricted Chromium issue does not disclose which WebCodecs operation miscalculates or fails to validate the heap-buffer boundary. A user must open the page; the published record confirms memory corruption but does not establish sandbox escape or code execution.

The record

CVE
CVE-2026-3544
Published
Mar 4, 2026
Updated
Mar 4, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-787, CWE-122, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 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=145.0.7632.159 <145.0.7632.159

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=145.0.7632.159 <145.0.7632.159

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 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-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
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

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Your stack

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