CVE-2026-12466: Heap buffer overflow in WebRTC in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker t

Q: How do I fix CVE-2026-12466?

chrome: upgrade to 149.0.7827.155. Exact commands for each OS are on this page.

Q: Is CVE-2026-12466 being exploited?

CVE-2026-12466 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-12466 affect?

CVE-2026-12466 affects chrome. Severity is high (CVSS 8.8). 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)

This month

HIGH 8.8UPGRADE

CVE-2026-12466 is a high-severity flaw (CVSS 8.8) affecting chrome. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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)

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-06-17
Last modified	2026-10-25

Publisher (CNA): Chrome · Vendor: google

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-17 13:20 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

google chrome UPGRADE

Affected: < 149.0.7827.155

Fixed in: 149.0.7827.155

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy chrome || rpm -q chrome || chrome --version

2. UPGRADE to 149.0.7827.155 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade chrome

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chrome

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-12466?

chrome: upgrade to 149.0.7827.155. Exact commands for each OS are on this page.

Is CVE-2026-12466 being exploited?

CVE-2026-12466 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-12466 affect?

CVE-2026-12466 affects chrome. Severity is high (CVSS 8.8). 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)

How urgent is CVE-2026-12466?

Priority 40/100. High severity

Software pages

Windows vulnerabilities · Google Chrome vulnerabilities · Chromium vulnerabilities

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References

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