# CVE-2026-12438 — Google Chrome

> As of 2026-06-18, CVE-2026-12438 is a HIGH-severity vulnerability in Google Chrome, CVSS v3.1 8.3, EPSS 0.2% (17.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-12438, most recently “Google Chrome 149 Multiple Memory-Corruption Vulnerabilities Enable Arbitrary Code Execution (CVE-2026-12437 through CVE-2026-12469)”.

**Last updated:** 2026-06-18

## What is CVE-2026-12438?

Inappropriate implementation in WebView in Google Chrome on Android prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

The record classifies CVE-2026-12438 under weakness class [CWE-693](https://cwe.mitre.org/data/definitions/693.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 88 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.3 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 17.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-17, last modified 2026-06-18

## Is CVE-2026-12438 being exploited?

No public exploitation evidence for CVE-2026-12438 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-06-18. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Google**: Chrome

## How to fix CVE-2026-12438

No vendor patch reference has been recorded for CVE-2026-12438 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-12438

1 tracked threat in the Threadlinqs corpus references CVE-2026-12438, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Google Chrome 149 Multiple Memory-Corruption Vulnerabilities Enable Arbitrary Code Execution (CVE-2026-12437 through CVE-2026-12469)](https://intel.threadlinqs.com/threat/TL-2026-0886) — CRITICAL · 2026-06-20

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-06-22.

**Other references**

- [chromereleases.googleblog.com](https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html)
- [issues.chromium.org](https://issues.chromium.org/issues/516947912)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-12438
Full detection coverage and IOCs for threats exploiting CVE-2026-12438 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp