CVE-2026-118027
Critical
Description
Frame poisoning in the Layout component. This vulnerability was fixed in Firefox ESR 115.44.
SeverityCritical
CVSS9.1
Exploit probability—
ProductFirefox ESR
PublishedOct 27, 2026
First seenOct 27, 2026
Weakness typeCWE-451CWE-451
How to fix
Update
- Firefox ESR115.44 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox ESR | No range specified | 115.44 |
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