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Use-after-free in Google Chrome Digital Credentials

IdentifiersCVE-2026-12439CWE-416

CVE-2026-12439 is a critical use-after-free vulnerability in the Digital Credentials component of Google Chrome. It affects Chrome versions prior to 149.0.7827.155. According to the provided advisory content, a remote attacker can trigger the flaw via a crafted HTML page, leading to heap corruption. The issue is a memory-safety bug in which freed memory is subsequently reused, creating conditions for memory corruption and potential control over browser process execution flow. Public technical details about the vulnerable function are not provided in the supplied content.

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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 may allow a remote attacker to cause heap corruption in the browser process. Based on the vendor and advisory context, this could result in browser compromise, including potential remote code execution, and may also cause a crash or denial of service. Broader Chromium advisory context also notes that such vulnerabilities can contribute to information disclosure or exploit chaining, but the specific confirmed impact in the supplied description is heap corruption with potential further compromise.

Mitigation

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

No specific workaround is provided in the supplied advisories beyond updating. As interim risk reduction, organizations can prioritize rapid browser patching, restrict use of outdated browser versions, and apply defense-in-depth controls such as endpoint protection or browser isolation where available, but the authoritative mitigation in the provided content is to update to a fixed version.

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

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 activity

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-12439
NVD
nvd.nist.gov/vuln/detail/CVE-2026-12439
MITRE CWE · CWE-416
cwe.mitre.org