CVE-2026-12447: Heap buffer overflow in WebRTC

Published May 15, 2026
·
Updated

Chromium: CVE-2026-12447 Heap buffer overflow in WebRTC

Other sources

Heap buffer overflow in WebRTC in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

— NVD

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.

— Microsoft

Credit

Google

Affected Software

8 affected componentsFixes available
Google Google Chrome<149.0.7827.155
Google Chrome<149.0.7827.155
149.0.7827.155
All of the following
Google Chrome<149.0.7827.155
Any of the following
Apple macOS
Linux Linux kernel
Microsoft Windows
Microsoft Edge<149.0.4022.80
Microsoft Edge (Chromium-based)<149.0.4022.80
149.0.4022.80

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 149.0.7827.155
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 149.0.4022.80
  3. Upgrade

    Upgrade Google Chrome/Chromium WebRTC to a version that resolves this vulnerability.

    Fixed in 149.0.7827.155
  4. Compensating control

    Ensure Microsoft Edge (Chromium-based) is updated to a Chromium build that includes CVE-2026-12447 mitigation (Chromium ingested by Edge addresses this vulnerability).

Event History

May 15, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Jun 17, 2026
CVE Published
via MITRE·01:38 AM
Data Sourced
via MITRE·01:38 AM
DescriptionWeakness
Data Sourced
via NVD·01:20 PM
DescriptionSeverityWeaknessAffected Software
Jun 19, 2026
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-12447?

CVE-2026-12447 has a severity rating of High due to the risk of remote code execution.

2

How do I fix CVE-2026-12447?

To fix CVE-2026-12447, update Google Chrome to version 149.0.7827.155 or later.

3

What type of vulnerability is CVE-2026-12447?

CVE-2026-12447 is classified as a heap buffer overflow vulnerability.

4

What does CVE-2026-12447 allow an attacker to do?

CVE-2026-12447 allows a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.

5

Which software is affected by CVE-2026-12447?

Google Chrome prior to version 149.0.7827.155 is affected by CVE-2026-12447.

Company

Resources

Contact

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