CVE-2026-13863: Insufficient validation of untrusted input in CustomTabs

Published Mar 25, 2026
·
Updated

Chromium: CVE-2026-13863 Insufficient validation of untrusted input in CustomTabs

Other sources

Insufficient validation of untrusted input in CustomTabs in Google Chrome on Android prior to 150.0.7871.47 allowed a local attacker to perform privilege escalation via a malicious file. (Chromium security severity: Medium)

— MITRE

This CVE was assigned by Chrome.  Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.

— Microsoft

Credit

Google

Affected Software

6 affected componentsFixes available
Google Chrome (Android)<150.0.7871.47
Google Chrome<150.0.7871.46
150.0.7871.46
All of the following
Google Chrome<150.0.7871.47
Google Android
Microsoft Edge (Chromium-based)<150.0.4078.48
150.0.4078.48
Microsoft Edge<150.0.4078.48

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 150.0.7871.46
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 150.0.4078.48
  3. Upgrade

    Upgrade Chromium (Android) to a version that resolves this vulnerability.

    Fixed in 150.0.7871.47

Event History

Mar 25, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Jun 30, 2026
CVE Published
via MITRE·10:38 PM
Data Sourced
via MITRE·10:38 PM
DescriptionWeakness
Data Sourced
via NVD·11:17 PM
DescriptionSeverityWeaknessAffected Software
Jul 11, 2026
Data Sourced
via Microsoft·10:41 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·10:41 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-13863?

CVE-2026-13863 has a high severity rating of 7.8 based on the CVSS 3.1 scoring.

2

How do I fix CVE-2026-13863?

To fix CVE-2026-13863, update Google Chrome on Android to version 150.0.7871.47 or later.

3

What type of vulnerability is CVE-2026-13863?

CVE-2026-13863 is an insufficient validation of untrusted input vulnerability found in CustomTabs of Google Chrome.

4

What impact does CVE-2026-13863 have?

CVE-2026-13863 allows a local attacker to perform privilege escalation through a malicious file.

5

Which versions of Google Chrome are affected by CVE-2026-13863?

CVE-2026-13863 affects Google Chrome on Android prior to version 150.0.7871.47.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203