Description
Frame poisoning in the Layout component. This vulnerability was fixed in Firefox ESR 115.44.
References2
Metrics
- CVSS 3.1
-
9.1
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - EPSS — exploit probability
- 0% percentile: 17 · as of 5 November 2026
- CWE
- CWE-451
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.