CVE-2026-84127

CVE-2026-84127

Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.

Vulnerability class: Information Disclosure

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

Frequently asked questions

What is CVE-2026-84127?: CVE-2026-84127 is a medium-severity vulnerability, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-09-01.
How severe is CVE-2026-84127?: Medium severity. CVSS v3 base score is 4.3 out of 10.