CVE-2026-84127

firefox: Firefox: Information disclosure in WebExtensions component

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Severity

Moderate

Red Hat Product Security

6.5

CVSS 3.1

Review impact separately from score.

Published · September 1, 2026

Updated · September 3, 2026

Description

A flaw was found in the WebExtensions component of Firefox for Android. This vulnerability allows for information disclosure, potentially enabling an attacker to gain access to sensitive data.

Statement

This issue only affected Firefox for Android (Fenix). Red Hat products ship desktop Firefox and are not affected.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CWE-201 · Insertion of Sensitive Information Into Sent Data