CVE-2026-92015
CVSS v3
8.8
HIGH
EPSS Score
0.3 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Technical details
- Published
- 2026-09-15
- Last Modified
- 2026-09-16
Frequently asked questions
What is CVE-2026-92015?
Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Is CVE-2026-92015 actively exploited?
Active exploitation of CVE-2026-92015 has not been confirmed. Its EPSS score was 0.3% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-92015?
CVE-2026-92015 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2026-92015 affecting your environment?
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