CVE-2026-13863

Insufficient Validation in Chrome CustomTabs Enables Local Privilege Escalation

Published Jun 30, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
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)

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4672-1 chromium security update
Debian DSA Debian DSA DSA-6378-1 chromium security update
History
Type Values Removed Values Added
Title Insufficient Validation in Chrome CustomTabs Enables Local Privilege Escalation
Type Values Removed Values Added
Title Privilege Escalation via Untrusted Input in CustomTabs on Android Chrome
Type Values Removed Values Added
Title Privilege Escalation via Untrusted Input in CustomTabs on Android Chrome
Type Values Removed Values Added
Title Insufficient validation of untrusted input in Chrome CustomTabs leading to local privilege escalation
Type Values Removed Values Added
Title Insufficient validation of untrusted input in Chrome CustomTabs leading to local privilege escalation
Type Values Removed Values Added
Title Privilege Escalation via Malicious File in Chrome CustomTabs
Type Values Removed Values Added
Title Privilege Escalation via Malicious File in Chrome CustomTabs
Type Values Removed Values Added
Title CustomTabs Input Validation Weakness Leading to Local Privilege Escalation in Chrome for Android
Type Values Removed Values Added
Title CustomTabs Input Validation Weakness Leading to Local Privilege Escalation in Chrome for Android
Type Values Removed Values Added
Title Privilege Escalation via Insufficient Validation in Chrome CustomTabs on Android
Type Values Removed Values Added
Title Privilege Escalation via Insufficient Validation in Chrome CustomTabs on Android
Type Values Removed Values Added
Title Local Privilege Escalation via Untrusted Input in Chrome CustomTabs
Type Values Removed Values Added
Title Local Privilege Escalation via Untrusted Input in Chrome CustomTabs
Type Values Removed Values Added
Title Invalid CustomTabs Input Validation Enables Local Privilege Escalation
Type Values Removed Values Added
Title Invalid CustomTabs Input Validation Enables Local Privilege Escalation
Type Values Removed Values Added
Title Local Privilege Escalation via Malformed CustomTabs File in Google Chrome on Android
Type Values Removed Values Added
Title Local Privilege Escalation via Malformed CustomTabs File in Google Chrome on Android
Type Values Removed Values Added
Title Privilege Escalation via CustomTabs Input Validation in Google Chrome on Android
Type Values Removed Values Added
Title Privilege Escalation via CustomTabs Input Validation in Google Chrome on Android
Type Values Removed Values Added
Title Privilege Escalation via Malicious File in Chrome CustomTabs
Type Values Removed Values Added
Title Privilege Escalation via Malicious File in Chrome CustomTabs
Type Values Removed Values Added
Title Local Privilege Escalation via Malformed CustomTabs Files in Chrome for Android
Type Values Removed Values Added
Title Local Privilege Escalation via Malformed CustomTabs Files in Chrome for Android
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Title Insufficient Validation in Chrome CustomTabs Enables Local Privilege Escalation
Type Values Removed Values Added
Title Insufficient Validation in Chrome CustomTabs Enables Local Privilege Escalation
Type Values Removed Values Added
Description 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)
Weaknesses CWE-20
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
Jul 2, 2026, 3:55 AM
Reserved
Jun 29, 2026, 11:03 PM
Status
Analyzed
Published
Jun 30, 2026, 11:17 PM
Modified
Oct 25, 2026, 9:10 PM