CVE-2026-92055
CVSS v3
8.8
HIGH
EPSS Score
0.2 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Privilege escalation in the DevTools component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Technical details
- Published
- 2026-09-15
- Last Modified
- 2026-09-16
Frequently asked questions
What is CVE-2026-92055?
Privilege escalation in the DevTools component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Is CVE-2026-92055 actively exploited?
Active exploitation of CVE-2026-92055 has not been confirmed. Its EPSS score was 0.2% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-92055?
CVE-2026-92055 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2026-92055 affecting your environment?
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