What is CVE-2026-9977?

CVE-2026-9977 is a high-severity vulnerability in Google Android, classified under Improper Input Validation. CVSS score: 8.3/10. Published 2026-05-28.

How severe is CVE-2026-9977?

High severity. CVSS v3 base score is 8.3 out of 10.

Improper input validation in Google Android

CVE-2026-9977

Insufficient validation of untrusted input in WebShare in Google Chrome on Android prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (26.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Google Android
Google Chrome — versions 148.0.7778.216

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

chrome-cve-admin@google.com (Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required)

Frequently asked questions

What is CVE-2026-9977?: CVE-2026-9977 is a high-severity vulnerability in Google Android, classified under Improper Input Validation. CVSS score: 8.3/10. Published 2026-05-28.
How severe is CVE-2026-9977?: High severity. CVSS v3 base score is 8.3 out of 10.