Is CVE-2026-100779 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-100779?

CVE-2026-100779 has a CVSS v3 severity of HIGH (8.8).

Back

Description

Use-after-free in the XSLT component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.