Description
Privilege escalation in Firefox for Android. This vulnerability was fixed in Firefox 155.
Affected products
mozilla: firefox mobile
References2
- www.mozilla.org/security/advisories/mfsa2026-82/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=2053320 Permissions Required
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 28 · as of 8 November 2026
- CWE
- CWE-284
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.