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Use-after-free in Media in Google Chrome

IdentifiersCVE-2026-12462CWE-416

CVE-2026-12462 is a high-severity use-after-free vulnerability in the Media component of Google Chrome affecting versions prior to 149.0.7827.155. According to the provided advisory text, the flaw can be triggered via a crafted HTML page and is exploitable by a remote attacker who has already compromised the renderer process. The vulnerability is a memory-safety error in which freed memory is subsequently reused, creating a condition for memory corruption and attacker-controlled behavior within the browser sandbox.

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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 arbitrary code execution inside the Chrome sandbox. The issue enables a remote attacker, after compromising the renderer process, to achieve further code execution in the sandboxed browser context. As reflected in the broader Chromium advisory context, memory-corruption issues of this class may also contribute to exploit chains involving denial of service, information disclosure, or sandbox-escape progression when combined with additional vulnerabilities, but the specific provided impact for CVE-2026-12462 is arbitrary code execution inside the sandbox.

Mitigation

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

No separate workaround or temporary mitigation is provided in the supplied advisories. The practical mitigation is prompt patching to a fixed browser version. Where immediate patching is not possible, reducing exposure to untrusted web content and applying defense-in-depth controls such as browser isolation and endpoint protections may reduce risk, but these are not vendor-provided fixes for the vulnerability.

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

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

ACTIVITY FEED

Recent activity

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

6 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 activity1

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-12462
NVD
nvd.nist.gov/vuln/detail/CVE-2026-12462
MITRE CWE · CWE-416
cwe.mitre.org