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Heap Buffer Overflow in WebRTC in Google Chrome

IdentifiersCVE-2026-12447CWE-122

CVE-2026-12447 is a high-severity heap buffer overflow in the WebRTC component of Google Chrome. According to the provided advisory content, affected versions are Chrome prior to 149.0.7827.155, and the issue can be triggered by a remote attacker via a crafted HTML page. The vulnerability is a memory corruption flaw in WebRTC that can lead to arbitrary code execution within the browser sandbox. The available source material does not identify the specific vulnerable function or code path.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can corrupt heap memory in the browser process and allow a remote attacker to execute arbitrary code inside the Chrome sandbox. Depending on exploit reliability and chaining with additional vulnerabilities, this may also contribute to browser compromise, denial of service, information disclosure, or sandbox-escape chains, but the provided content specifically confirms code execution within the sandbox.

Mitigation

If you can’t patch tonight, do this now.

No separate vendor workaround is provided in the supplied advisories beyond patching. As interim risk reduction, limit exposure to untrusted web content, apply browser isolation or comparable defense-in-depth controls where available, and monitor enterprise environments for outdated Chrome/Chromium/Edge versions until upgrades are completed.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 149.0.7827.155 or later. For Chromium on Debian, upgrade to 149.0.7827.155-1~deb13u1 on Debian stable (trixie) or 149.0.7827.155-1~deb12u1 on Debian oldstable (bookworm). For Microsoft Edge (Chromium-based), upgrade to version 149.0.4022.80 or later, which incorporates the Chromium fix.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
GoogleChromeapplication
Microsoft CorporationEdgeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

5 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-12447
NVD
nvd.nist.gov/vuln/detail/CVE-2026-12447
MITRE CWE · CWE-122
cwe.mitre.org