CVE-2026-74986
critical · 9.1Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
9.1
CVSS
0.6%
EPSS (exploit prob.)
46th
EPSS percentile
2026-08-18
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weaknesses
CWE-200
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| mozilla | firefox | < 153.1.0 |
| mozilla | thunderbird | < 153.1.0 |
Check a specific version with /api/v1/cve/match.
References
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-74986