CVE-2026-8090
HIGH severity · CVSS 7.3 · Use-after-free
7.3CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactLow
Integrity impactLow
Availability impactLow
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2026-40/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-41/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-42/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-43/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-44/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=2034352