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://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8090.json

https://bugzilla.redhat.com/show_bug.cgi?id=2467709

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

https://access.redhat.com/security/cve/CVE-2026-8090

https://access.redhat.com/errata/RHSA-2026:25015

https://access.redhat.com/errata/RHSA-2026:24983

https://access.redhat.com/errata/RHSA-2026:24755

https://access.redhat.com/errata/RHSA-2026:24516

https://access.redhat.com/errata/RHSA-2026:24511

https://access.redhat.com/errata/RHSA-2026:24510

https://access.redhat.com/errata/RHSA-2026:24509

https://access.redhat.com/errata/RHSA-2026:24508

https://access.redhat.com/errata/RHSA-2026:20574

https://access.redhat.com/errata/RHSA-2026:20566

https://access.redhat.com/errata/RHSA-2026:19160

Details

Source: Mitre, NVD

Published: 2026-05-07

Updated: 2026-06-30

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: 7.5

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