Vulnerability Description
Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
CVSS Score
7.3
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 115.35.2 |
| Mozilla | Thunderbird | < 140.10.2 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2034352Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-40/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-41/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-42/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-43/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-44/Vendor Advisory
FAQ
What is CVE-2026-8090?
CVE-2026-8090 is a vulnerability with a CVSS score of 7.3 (HIGH). Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
How severe is CVE-2026-8090?
CVE-2026-8090 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-8090?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Thunderbird.