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Use-after-free in Chromoting in Google Chrome for Windows

IdentifiersCVE-2026-12449CWE-416

CVE-2026-12449 is a high-severity use-after-free vulnerability in the Chromoting component of Google Chrome on Windows prior to version 149.0.7827.155. The available advisory information states that improper lifetime management in Chromoting can lead to a use-after-free condition when processing a malicious file. On successful trigger, freed memory may be reused while still referenced, creating a memory corruption condition that can be leveraged by a local attacker. Google classifies the issue as High severity, and the published impact specifically identifies OS-level privilege escalation on Windows.

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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 allows a local attacker to achieve OS-level privilege escalation on an affected Windows system. Because the flaw is a use-after-free memory corruption issue, exploitation may enable execution in a more privileged context than the attacker initially possesses, potentially resulting in full compromise of the local host depending on the privileges obtained.

Mitigation

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

No specific workaround is provided in the cited advisories. Until patching is completed, reduce exposure by preventing untrusted local files from being opened or processed in affected environments, restricting local attacker access, and applying standard endpoint hardening and least-privilege controls on Windows systems. Primary mitigation is to update the browser to a fixed version.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome on Windows to version 149.0.7827.155 or later. Chromium downstream consumers should apply the corresponding fixed Chromium release. For Debian, the referenced fixed chromium package versions are 149.0.7827.155-1~deb13u1 for trixie and 149.0.7827.155-1~deb12u1 for 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-2026-12449
NVD
nvd.nist.gov/vuln/detail/CVE-2026-12449
MITRE CWE · CWE-416
cwe.mitre.org