CVE-2026-8090

high

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.

References

https://www.mozilla.org/security/advisories/mfsa2026-44/

https://www.mozilla.org/security/advisories/mfsa2026-43/

https://www.mozilla.org/security/advisories/mfsa2026-42/

https://www.mozilla.org/security/advisories/mfsa2026-41/

https://www.mozilla.org/security/advisories/mfsa2026-40/

https://bugzilla.mozilla.org/show_bug.cgi?id=2034352

Details

Source: Mitre, NVD

Published: 2026-05-07

Updated: 2026-05-08

Risk Information

CVSS v2

Base Score: 7.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L