CVE-2026-117864

HIGH 8.8CVE-2026-117864 · Published 27/10/2026 · updated 04/11/2026

In short

CVE-2026-117864 is a HIGH (CVSS 8.8) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 0.39%, higher than 33.5% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Sandbox escape in the Form Manager component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

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