CVE-2023-6706Network attack vector

Heap corruption via FedCM use-after-free

Published Dec 14, 2023 · Updated Feb 25, 2026

Use after free in FedCM in Google Chrome before 120.0.6099.109 allows remote attackers to trigger heap corruption via crafted HTML. The FedCM implementation accesses freed memory, but Google has not published the affected object or code path. The attack requires specific user interaction with an attacker-controlled page; the public record does not establish code execution.

CVSS severity8.8
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use after free in FedCM in Google Chrome before 120.0.6099.109 allows remote attackers to trigger heap corruption via crafted HTML. The FedCM implementation accesses freed memory, but Google has not published the affected object or code path. The attack requires specific user interaction with an attacker-controlled page; the public record does not establish code execution.

The record

CVE
CVE-2023-6706
Published
Dec 14, 2023
Updated
Feb 25, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=120.0.6099.109 <120.0.6099.109

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=120.0.6099.109 <120.0.6099.109

Published CVSS scores

8.8NIST National Vulnerability DatabaseCVSS: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-416Use After Free
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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