Paper/Archive/CVE-2026-92034

CVE-2026-92034

Mozilla Firefox — Site isolation issue in the Graphics component

EPSS 0.3%CVSS 9.1

critical.is priorityof 100

31

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 19.9.199 × 204.0 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

Affected

ProductAffectedFixed inSource

Firefoxsee advisory156CNA

Thunderbirdsee advisory156CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=2060295 refmozilla.org/security/advisories/mfsa2026-90 refmozilla.org/security/advisories/mfsa2026-94