Exposure of sensitive information to an unauthorized actor in Mozilla products - CVE-2026-4700
Published: March 24, 2026
Vulnerability identifier: #VU124310
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-4700
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox ESR
Firefox for Android
Mozilla Firefox
Firefox ESR
Firefox for Android
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass security mitigations.
The vulnerability exists due to improper input validation in the Networking: HTTP component when handling HTTP requests. A remote attacker can trick the victim into visiting a specially crafted website to bypass security mitigations.
How to mitigate CVE-2026-4700
Install security update from vendor's website.