PT-2026-38428 · Mozilla · Firefox

Kevin Brosnan · Published 2026-05-07 · Updated 2026-05-07 · CVE-2026-8090

Mitre

CVSS v3.1

7.3

High

Base vector

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

Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, and Firefox ESR 115.35.2.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-8090

Affected Products

Firefox

References · 5

• https://mozilla.org/security/advisories/mfsa2026-42 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-8090 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-40 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-41 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=2034352 · Note