CVE-2024-0811Public exploitNetwork attack vector

Cross-origin data disclosure via racy access check

Published Jan 23, 2024 · Updated Jun 16, 2025

Information disclosure in Google Chrome before 121.0.6167.85 allows attackers to leak cross-origin data through a malicious extension. The chrome.pageCapture.saveAsMHTML() API performs a racy access check that lets a blocked origin become capturable before enforcement completes. Exploitation requires a user to install the crafted extension; the resulting access is limited to cross-origin data disclosure.

CVSS severity4.3
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Google Chrome before 121.0.6167.85 allows attackers to leak cross-origin data through a malicious extension. The chrome.pageCapture.saveAsMHTML() API performs a racy access check that lets a blocked origin become capturable before enforcement completes. Exploitation requires a user to install the crafted extension; the resulting access is limited to cross-origin data disclosure.

The record

CVE
CVE-2024-0811
Published
Jan 23, 2024
Updated
Jun 16, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1176, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 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=121.0.6167.85 <121.0.6167.85

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=121.0.6167.85 <121.0.6167.85

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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 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 exploitPublished

Weakness, pattern, technique

T1176Browser Extensions
T1204.002Malicious File

Public exploit references

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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