CVE-2026-12466: Heap buffer overflow in WebRTC
Chromium: CVE-2026-12466 Heap buffer overflow in WebRTC
Other sources
Heap buffer overflow in WebRTC in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code 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
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 149.0.7827.155 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 149.0.4022.80
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-12437
- CVE-2026-12438
- CVE-2026-12439
- CVE-2026-12440
- CVE-2026-12441
- CVE-2026-12442
- CVE-2026-12443
- CVE-2026-12444
- CVE-2026-12445
- CVE-2026-12446
- CVE-2026-12447
- CVE-2026-12448
- CVE-2026-12449
- CVE-2026-12450
- CVE-2026-12451
- CVE-2026-12452
- CVE-2026-12453
- CVE-2026-12454
- CVE-2026-12455
- CVE-2026-12456
- CVE-2026-12457
- CVE-2026-12458
- CVE-2026-12459
- CVE-2026-12460
- CVE-2026-12461
- CVE-2026-12462
- CVE-2026-12463
- CVE-2026-12464
- CVE-2026-12465
- CVE-2026-12467
- CVE-2026-12468
- CVE-2026-12469
Frequently Asked Questions
What is the severity of CVE-2026-12466?
CVE-2026-12466 has a high severity rating of 86, indicating serious risks associated with exploitation.
How do I fix CVE-2026-12466?
To mitigate CVE-2026-12466, update Google Chrome for Windows to version 149.0.7827.155 or later.
What is the cause of CVE-2026-12466?
CVE-2026-12466 is caused by a heap buffer overflow vulnerability in WebRTC within Google Chrome.
Who is affected by CVE-2026-12466?
All users of Google Chrome for Windows prior to version 149.0.7827.155 are affected by CVE-2026-12466.
What type of attack does CVE-2026-12466 allow?
CVE-2026-12466 allows a remote attacker to execute arbitrary code via a crafted HTML page.