CVE-2026-118027

Firefox: Frame poisoning in the Layout component

Mozilla FirefoxApplications & CMS

CVSS

NoneNot scored

ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV

Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet

Fixed inNone listedNo source names a fixed version. Check the vendor advisory below

Published27 Oct 2026Updated 27 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Frame poisoning in the Layout component. This vulnerability was fixed in Firefox ESR 115.44.

Text from CVE List