cve.bz

CVE-2026-74960

8.1 highEPSS 0.2%

High (8.1) in mozilla. EPSS 0.2% chance of exploitation in the next 30 days.

Site isolation issue in the WebExtensions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Severity

CVSS 3.1

8.1 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS
0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-31)
CWEs
CWE-284, CWE-346
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON