Input validation error in Google Chromium - CVE-2026-9977

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Main Vulnerability Database Vulnerabilities #VU132888

Input validation error in Google Chromium - CVE-2026-9977

Published: May 29, 2026


Vulnerability identifier: #VU132888
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-9977
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in WebShare component in Google Chrome. A remote attacker can trick the victim to open a specially crafted web page and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Google Chromium
Microsoft Edge
Debian Linux
Fedora
chromium
chromium (Debian package)

How to mitigate CVE-2026-9977

Install update from vendor's website.

Google Chromium - update to 148.0.7778.215
Microsoft Edge - update to 148.0.3967.97
chromium - addressed in versions 148.0.7778.215-1.el9, 148.0.7778.215-1.el10_2, 148.0.7778.215-1.el10_3, 148.0.7778.215-1.fc43, 148.0.7778.215-1.fc44
chromium (Debian package) - addressed in versions 148.0.7778.215-1~deb12u1, 148.0.7778.215-1~deb13u1

External References

Related Security Bulletins