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CVE-2026-12438 Google CVE debrief

CVE-2026-12438 is a Critical vulnerability in Google Chrome's WebView on Android prior to version 149.0.7827.155. This vulnerability allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. The Chromium security severity of this vulnerability is Critical, with a CVSS score of 8.3 and a HIGH severity rating. The vulnerability affects users of Google Chrome on Android. To protect themselves, users should ensure they are running version 149.0.7827.155 or later of Google Chrome.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-18
Advisory published
2026-06-17
Advisory updated
2026-06-18

Who should care

This vulnerability affects users of Google Chrome on Android. To protect themselves, users should ensure they are running version 149.0.7827.155 or later of Google Chrome. Additionally, administrators should review and update software dependencies to ensure that they are current and secure, and consider implementing additional security controls, such as network segmentation or access controls, to limit the potential impact of a successful exploit.

Technical summary

The vulnerability is caused by an inappropriate implementation in WebView in Google Chrome on Android prior to version 149.0.7827.155. This allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H. The Chromium security severity of this vulnerability is Critical, with a CVSS score of 8.3 and a HIGH severity rating. The vulnerability affects Google Chrome on Android, and users should ensure they are running version 149.0.7827.155 or later to protect themselves.

Defensive priority

High

Recommended defensive actions

  • Apply the official patch by updating Google Chrome to version 149.0.7827.155 or later.
  • Ensure that Google Chrome is configured to automatically update to the latest version.
  • Monitor Google Chrome for any suspicious activity, such as unexpected changes to settings or unusual network requests.
  • Consider implementing additional security controls, such as network segmentation or access controls, to limit the potential impact of a successful exploit.
  • Regularly review and update software dependencies to ensure that they are current and secure.

Evidence notes

The CVE record was published on 2026-06-17T13:19:58.980Z and was last modified on 2026-06-18T13:47:39.107Z. The NVD entry is currently Analyzed. The vulnerability is caused by an inappropriate implementation in WebView in Google Chrome on Android prior to version 149.0.7827.155. This allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H. The Chromium security severity of this vulnerability is Critical, with a CVSS score of 8.3 and a HIGH severity rating.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12438 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12438

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12438 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12438

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.